In the following question, four words are given out of which one word is incorrectly spelt. Select the incorrectly spelt word.

Introduction / Context:
Spelling questions like this check your familiarity with common English words that appear frequently in reading and writing. The test here is to identify which one of the four given spellings is incorrect according to standard English usage. Such questions reward careful reading and prior exposure to correctly written vocabulary in books, newspapers and exams.

Given Data / Assumptions:
Options: Anxiety, Believe, Height, Peity.
Three of these words are correctly spelt; one is not.
We assume standard modern English spelling as found in dictionaries and textbooks.
We must identify the incorrectly spelt word, not the rarest or hardest word.

Concept / Approach:
The words Anxiety, Believe and Height are common and their spellings are well established. The word related to religious devotion is Piety, not Peity. The incorrect option thus shows a transposition of vowels e and i. The strategy is to mentally recall each word in context and see whether the spelling matches the familiar dictionary form. If you are unsure, try to pronounce each and visualise how it usually appears in print.

Step-by-Step Solution:
Step 1: Check Anxiety. Anxiety is correctly spelt A N X I E T Y and refers to a feeling of worry or nervousness. Step 2: Check Believe. Believe is correctly spelt B E L I E V E and is the standard verb meaning to accept something as true. Step 3: Check Height. Height is correctly spelt H E I G H T and refers to how tall something is. Step 4: Check Peity. The correct word for religious devotion is Piety, spelled P I E T Y. The given spelling P E I T Y (Peity) is incorrect. Step 5: Because the only incorrect spelling is Peity, option D is the answer to mark.

Verification / Alternative check:
You can verify by placing each word in a typical sentence: She felt great anxiety before the exam, I believe you, His height is above average, and Her piety impressed everyone at the temple. When written correctly, these words match the standard spellings Anxiety, Believe, Height and Piety. The spelling Peity never appears in reputable dictionaries, confirming that it is the error.

Why Other Options Are Wrong:
Anxiety is a common word and its spelling with x and ety is standard; changing it would produce a non existent form.
Believe follows the familiar rule i before e except after c in this specific pattern; it is widely known and correctly spelt here.
Height may be tricky because of the unusual order of letters e i g h t, but this is the correct and accepted spelling in English.

Common Pitfalls:
Learners may hesitate on Height because it looks irregular, but in fact it is a high frequency word that must simply be memorised. The real trap here is Peity, which may look plausible at first glance, but the correct pattern in related words is Piety, Pious, and Pietism, all using pi, not pe. Training your eye to recognise vowel patterns in families of words is a useful strategy for spelling questions.

Final Answer:
The incorrectly spelt word is Peity (option D); the correct spelling is Piety.