Read the excerpt from the song, “brother, can you spare a dime? ” once i built a tower, up to the sun, brick, and rivet, and lime, once i built a tower, now it's done— which reality of the great depression does the excerpt convey? stock market crash decreased demand for products increased unemployment lower agricultural production

This excerpt of the song, "Brother, Can You Spare a Dime?", conveys increased unemployment. It implies that the person had worked before building towers, but that he no longer does. There is nothing in this passage specifically about the stock market crash or lower agricultural production. It also does not specifically state that the demand for towers is lower, just that he no longer builds towers.

modifying the base for word

this would be in the imperative mood. it is a category of verb forms that are used to express orders,instructions,commands or requests.