(GIVING BRAINLIEST) Which variable is described as a factor you can change to observe whether or not it has an effect on the outcome variable?

A) Control
B) Hypothesis
C) Test
D) Question

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Name the tissue that in translocation

Which of the following is a heterotroph?