Which of the following is a benefit of a scientific investigation?

a: it's results do not apply to real life
b: it can be performed in natural settings.
c: it's environment is tightly controlled.
d: it requires setting up a hypothesis.

I would say D

Explanation:

A doesn't make sense and you can do scientific investigation in natural settings and controlled settings making D the only answer left.

the answer is trees if i'm not mistaken

compost can be added to topsoil as a:

pesticide