The correct answer is B: .
Explanation:
The phrase "The cat fell" implies that the cat is moving downward, and it needs a preposition to indicate the destination or direction of the fall. In this case, we are looking for the preposition that indicates movement downward into something.
- A:

above

: This preposition indicates a position higher than something. It does not convey the idea of movement downward into something, so it is not the correct answer.
- B:

into

: This preposition indicates movement or direction toward the inside of something. It conveys the idea of the cat falling into the well, which makes it the correct answer.
- C:

on

: This preposition indicates a position above or resting on something. It does not convey the idea of movement downward into something, so it is not the correct answer.
- D:

in

: This preposition indicates a position or location inside something. It does not convey the idea of movement downward into something, so it is not the correct answer.
In conclusion, the correct preposition to complete the sentence is "into" because it accurately conveys the idea of the cat falling into the well.

Explanation:

Understanding the preposition 'into':
- The preposition 'into' indicates movement towards the inside of something.
- In this case, the cat fell inside the well, implying movement into the well.

Usage of prepositions:
- Prepositions are words that show the relationship between a noun or pronoun and other words in a sentence.
- They help us understand the position, direction, or location of something.

Correct answer - 'into':
- Since the cat fell inside the well, the appropriate preposition to use in this context is 'into'.
- The word 'into' accurately conveys the direction of the cat's movement towards the interior of the well.

Incorrect options:
- Option 'a' - 'above' would imply the cat fell from a higher position than the well.
- Option 'c' - 'on' does not convey the movement of the cat towards the interior of the well.
- Option 'd' - 'in' could be misleading as it does not clearly indicate the movement into the well.
Therefore, the correct answer is option 'b' - 'into', as it correctly describes the cat's action of falling inside the well.