Do you always go to school . . . . . foot?

Solution (By Examveda Team)

The question asks about the correct preposition to use with "foot" when referring to the mode of transportation.
Preposition: A preposition is a word that shows the relationship between a noun or pronoun and another word in the sentence. It indicates things like location, time, direction, or manner.
On foot: This phrase means "walking." It is a fixed expression in English, meaning we don't use other prepositions with "foot" in this context.
Therefore, the correct answer is A: on.
Let's look at why the other options are incorrect:
B: by – "By foot" is grammatically correct in some contexts, but it is less common than "on foot" and sounds slightly unnatural to many native speakers when talking about regular travel to school. "By" is typically used with other means of transportation (e.g., by bus, by car, by train).
C: with – "With foot" is grammatically incorrect in this context. "With" indicates accompaniment or the instrument used to perform an action.
D: walking – "Walking" is a verb, not a preposition. While you could say "Do you always go to school walking?", it's grammatically correct but less concise and common than "Do you always go to school on foot?".