Explanations:Prepositions are words that indicate the relationship between a noun or pronoun and other parts of the sentence. In the context of geographical locations, prepositions are used to describe the spatial relationship between a place and its surroundings. The correct preposition to use in this context is "on," as it indicates that the city of Mumbai is situated directly on the west coast of India.
The preposition "on" is used when something is in direct contact with a surface or a line. In this case, the city of Mumbai is located directly on the coastline, which is a line that separates the land from the sea. Therefore, "on" is the most appropriate preposition to use when describing the city's location relative to the coast.
Other prepositions like "in," "to," and "of" do not accurately describe the relationship between the city and the coast. "In" would imply that the city is inside the coast, which is not the case. "To" would suggest a direction or destination, which is not applicable here. "Of" would indicate possession or a part of something, which is not the correct relationship between the city and the coast.
Understanding the correct use of prepositions in geographical contexts is important for accurately describing the location of places. This knowledge is particularly useful in geography, cartography, and navigation, where precise descriptions of locations are essential.