Question

unlike animals, most plants do not eat food. plants use photosynthesis to make sugar, which they use as food. plant cells break down sugar to get the energy they need.
but, like animal cells, plant cells do make many chemicals. plant cells make some chemicals that the plant does not need.
what waste do most plants need to remove? select all that apply.
undigested food
unneeded chemicals that plant cells make

Explanation:

The text states that plants do not eat food like animals (so undigested food is not relevant as they don't have a digestive process of eating food in the same way). But it clearly mentions "Plant cells make some chemicals that the plant does not need", which indicates unneeded chemicals that plant cells make is a waste they need to remove.

Answer:

unneeded chemicals that plant cells make