Question

experimental design, knowledge check
due sunday by 11:59pm points 0 submitting an external tool available until sep 14 at 11:59pm
this isnt for points, its just for fun, and for you to check how youre doing so far:
a researcher wants to find out if putting fertilizer on his plants will make them grow taller. identify the independent variable.
the fertilizer
the growth of the plant

Explanation:

An independent variable is manipulated. Here, the researcher decides to apply or not apply fertilizer.

Answer:

A. The fertilizer