You want to see if mold grows faster on bread in the shade than on bread in the sun. your experimental variable is 1.mold 2.bread 3.the sun

Actually the sun does change, you are comparing whether the mold will grow faster with and without the sun. so the answer would be the bread, the bread doestn change.

i don’t no. suiopgohjk

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.