What is the main idea of this paragraph?

In France, people like to eat a mushroomlike food called truffles. Truffles are not easy to find because they grow underground. Some people in France train pigs to find the right place to dig. The pigs can smell the truffles even though they are deep in the soil.

Which statement best describes the use of the underlined word in the excerpts? in excerpt 1, it refers to personal growth, while in excerpt 2, it suggests the physical act of moving. in excerpt 1, it refers to personal growth, while in excerpt 2, it suggests scientific discoveries. in excerpt 1, it refers to societal advancement, while in excerpt 2, it suggests the gradual march of time. in excerpt 1, it refers to societal advancement, while in excerpt 2, it suggests steps toward a particular goal.