Opposite of tall is "Short".

Explanation:

The opposite of a word is a word that has the opposite meaning. In this case, we are looking for the opposite of the word "tall". Let's analyze the given options and determine the correct answer.

a) Taller:
The word "taller" is a comparative form of the word "tall". It means someone or something is more tall than another person or object. However, it is not the opposite of "tall" as it represents a higher degree of height.

b) Talking:
The word "talking" is unrelated to the word "tall" and does not have an opposite meaning. It refers to the act of speaking or having a conversation. Therefore, it is not the correct answer.

c) Short:
The word "short" is the opposite of "tall". It represents a lower degree of height or a lack of height. When we compare the two words, "tall" and "short", we can see that they have opposite meanings. Therefore, "short" is the correct answer.

d) Sound:
The word "sound" is unrelated to the word "tall" and does not have an opposite meaning. It refers to vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear. Therefore, it is not the correct answer.

To summarize, the opposite of tall is "short". The word "short" represents a lower degree of height or a lack of height, while "tall" represents a higher degree of height.

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