Question

how would a houseplant respond to sunlight that comes from one direction?

by bending its stem toward the sun

by growing roots downward through the soil

by curling its stem around its leaves

by closing its leaves at night

Explanation:

This is a plant response to directional sunlight, known as phototropism. Roots growing downward is gravitropism, curling stems around leaves is thigmotropism, and closing leaves at night is nyctinasty, which are unrelated to one-directional sunlight.

Answer:

by bending its stem toward the sun