Opposite Adverb: Quickly

- The opposite adverb for slowly is quickly.
- The adverb slowly describes the speed or pace at which the snail is moving.
- When we say that the snail is moving slowly, it means that it is not moving fast or at a high speed.
- On the other hand, the opposite adverb quickly suggests that the snail is moving at a fast pace or with great speed.

Explanation:
The sentence "The snail is moving slowly" implies that the snail is not moving quickly or rapidly. It suggests that the snail is taking its time and moving at a slow pace. To find the opposite adverb, we need to look for an adverb that describes the snail as moving quickly or rapidly.

Option A: Bravely
The adverb bravely describes an action done with courage or bravery. It does not indicate anything about the speed or pace of movement. Therefore, it is not the opposite adverb for slowly.

Option B: Politely
The adverb politely describes an action done with politeness or good manners. It also does not indicate anything about the speed or pace of movement. Hence, it is not the opposite adverb for slowly.

Option C: Kindly
The adverb kindly describes an action done with kindness or generosity. Like the previous options, it does not indicate anything about the speed or pace of movement and is not the opposite adverb for slowly.

Option D: Quickly
The adverb quickly describes an action done at a fast pace or with great speed. In the given sentence, the snail is moving slowly, so the opposite adverb would be quickly. Choosing this option as the correct answer indicates that the snail is not moving slowly but rather moving quickly.

Therefore, option D, "Quickly," is the opposite adverb for slowly in the sentence "The snail is moving slowly."