How does modifying the land with terraces benefit humans?
a. terraces allow people to build on land for better views.
b. terraces increase the land for planting.
c. terraces reduce water run-off to prevent flooding.
d. terraces permit land to be used for mining purposes.

The correct answer is B.Terraces increase the land for planting.

Explanation

The construction of cultivation terraces is a millenary tradition in which the indigenous cultures that inhabited mountainous and steep areas had to modify the surface of the earth with the objective of having soils for the cultivation of their food. These cultivation terraces were used by pre-Hispanic cultures because the geographical conditions of the mountainous area of the Andes have very steep sectors and where cultivation was difficult. In addition, Asian cultures like China have used it since antiquity to this day. So, the correct answer is B. Terraces increase the land for planting.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."