In this error spotting question, identify the part that contains the incorrect verb form in the sentence about protecting and sustaining Earth's resources.

Introduction / Context:
This error spotting question focuses on parallel structure and verb forms in a sentence about environmental responsibility. The sentence says that Earth's resources have to be protected and sustain, and then talks about sharing resources across species. Although the message is meaningful, one part of the sentence uses the wrong form of a verb, breaking the parallel construction. Recognising and correcting this type of error is important for clear and grammatically correct writing.

Given Data / Assumptions:

• Part 1: Earth’s resources have to be protected and sustain and we need to
• Part 2: share our resources across species as we all are
• Part 3: interconnected as one giant living organism.
• Part 4: No error
• The intended idea is that resources must be protected and sustained.

Concept / Approach:
The key phrase is have to be protected and sustain. The auxiliary structure have to be should be followed by past participles to form a passive construction, such as protected and sustained. Using sustain in base form after be creates a mismatch in verb forms and breaks the parallelism between protected and sustained. Therefore, the correct phrase is have to be protected and sustained, which keeps both verbs in the same grammatical form and clearly expresses that resources must be kept safe and maintained over time.

Step-by-Step Solution:
Step 1: Identify the verb phrase following have to be, which is protected and sustain. Step 2: Notice that protected is a past participle, while sustain is in base form. Step 3: Recall that in passive constructions with have to be, we use past participles for all verbs in a coordinated pair. Step 4: Mentally correct sustain to sustained, giving protected and sustained. Step 5: Conclude that the error lies in part 1, where the non parallel verb form appears.

Verification / Alternative check:
Rewrite the sentence with the correction: Earth’s resources have to be protected and sustained and we need to share our resources across species as we all are interconnected as one giant living organism. Reading this version shows that the verbs protected and sustained now match in form and that the sentence flows naturally. Since only part 1 had to be modified, we can confirm that part 1 contains the error. Parts 2 and 3 are grammatically correct and convey the intended ecological message clearly.

Why Other Options Are Wrong:
Part 2, share our resources across species as we all are, uses share in base form correctly after need to and has no errors.

Part 3, interconnected as one giant living organism, properly uses the past participle interconnected as a complement to are, forming a correct predicate.

Part 4 claims No error, which is incorrect because we have already identified the verb form problem in part 1.

Common Pitfalls:
Students sometimes miss parallelism issues when two verbs are joined by and, especially if the overall meaning is easy to understand. A good habit is to check that all verbs in a series controlled by a common auxiliary are in the same form, for example, be protected and sustained, or to read the phrase without one of the verbs to see if it still makes grammatical sense. In this case, have to be sustain is clearly wrong, which helps point to the error.

Final Answer:
The error is in part 1; it should read have to be protected and sustained.