Sarah wants to know where in her garden chamomile would grow the best. She thinks chamomile will grow best in the corner of the garden that gets the most sunlight. To test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. Which of the following variables should Sarah keep the same between all the chamomile plants?
A.
the type of plants
B.
the height of the plants
C.
the location of the plants
D.
all of these

A - The type of plants

Explanation:

A - Keeping the same type of plant allows no other variables like:

different rates of growth, temperature, etc. to affect one plant more than another.

B - The height of the plant is the variable you're trying to see the out come for, not to change.

C - The location IS the thing you are trying to change, so you wouldn't want it to stay the same.

D - Since B and C are wrong, it cannot be all.

is there multiple choice or do you need like an essay answer?