You are presented with the quiz "What kind of effect does a squirrel have on the ecosystem?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "planting trees has a positive impact on an ecosystem" and "thus one important job the squirrel does in the ecosystem is to plant trees". So, what's the best answer to the question?
Choose from:
a). Negative.
b). Positive.
c). adding heat.
d). growth.
e). food.
f). Destructive.
g). Powerful.
h). support.
Answer:
b).