Question

jenna is testing how fertilizer affects plant height. what might be a constant in this experiment?
all of these
the type of plant in each group
the amount of water given to each group of plants
the amount of sunlight provided to each group of plants

Explanation:

In an experiment testing how fertilizer affects plant height, to isolate the effect of fertilizer, other factors like plant type, water - amount, and sunlight - amount should be kept constant. These are controlled variables that could otherwise influence plant height.

Answer:

A. All of these