Read the following sentence and identify the part that contains an error, or select "No error" if the sentence is correct: "It is not difficult to believe that a man who has lived in this for a long time he will never feel at home anywhere else in the world."

Introduction / Context:
This error spotting question deals with clause structure and the unnecessary repetition of the subject in a complex sentence. The sentence tries to combine a relative clause ("who has lived in this for a long time") and a main clause about how the man feels. However, it incorrectly introduces an extra pronoun "he" in the final part, making the sentence ungrammatical.

Given Data / Assumptions:

• Full sentence: "It is not difficult to believe that a man who has lived in this for a long time he will never feel at home anywhere else in the world."
• Parts: (a) It is not difficult to believe that a man, (b) who has lived in this for a long time, (c) he will never feel at home anywhere else in the world., (d) No error.
• The intended meaning: it is easy to believe that a man who has lived in this place for a long time will never feel at home anywhere else.

Concept / Approach:
In English, once a subject has been introduced in a main clause and then described by a relative clause beginning with "who", we do not repeat the subject pronoun before the verb of the same clause. The subject "a man who has lived in this for a long time" should be followed directly by "will never feel at home...". The insertion of "he" is redundant and breaks the structure. Therefore, the error lies in part (c), where "he" must be removed.

Step-by-Step Solution:
Step 1: Combine parts (a) and (b): "It is not difficult to believe that a man who has lived in this for a long time..." This forms a correct subject phrase with a relative clause.Step 2: Examine part (c): "he will never feel at home anywhere else in the world." Here, the pronoun "he" is unnecessary because the subject has already been fully specified in the preceding words.Step 3: The correct continuation should be: "will never feel at home anywhere else in the world" without "he".Step 4: Thus, part (c) contains the error due to this redundant pronoun.Step 5: A corrected sentence would read: "It is not difficult to believe that a man who has lived in this for a long time will never feel at home anywhere else in the world."

Verification / Alternative check:
Read the corrected version aloud: "It is not difficult to believe that a man who has lived in this for a long time will never feel at home anywhere else in the world." The sentence is now smooth and grammatically sound. If we add "he" again—"that a man who has lived in this for a long time he will never feel..."—the repetition becomes obvious and clumsy. This confirms that part (c) is indeed the faulty segment.

Why Other Options Are Wrong:
Part (a) "It is not difficult to believe that a man" is correctly formed and sets up the clause. Part (b) "who has lived in this for a long time" is also correct, although "in this" would be clearer if it specified a place, such as "in this city", but grammatically it is fine. Option (d) "No error" cannot be chosen because we have clearly identified the unnecessary "he" in part (c).

Common Pitfalls:
Students sometimes overlook redundant subjects because they are used to similar structures in informal speech. Another pitfall is focusing on minor stylistic awkwardness ("in this") instead of the major grammatical issue. To master such questions, pay special attention to relative clauses beginning with "who", "which", or "that", and ensure that the main verb follows directly without a repeated pronoun. This will help you quickly detect and fix errors like the one in this sentence.

Final Answer:
The error is in part "he will never feel at home anywhere else in the world.", where the pronoun "he" should be removed.