Answer: Sex cell is the correct answer.
If I'm not mistaken id say its small temperature changes
D. Things that are kept constant.
Controls are used in an experiment where some variable is being changed. By only changing one thing and keeping the others constant they can make sure that any change in the results is caused by the variable and not the constant, since the constant didn’t change.
Answer:b. microsystem.
Explanation:
The microsystem is one of the component of ecological system theory. The microsystem describes the system, which is close proximity to the person. For example, the interaction of child with the school teachers, classmates, friends, parents and siblings. The person learns a lot through the direct interaction with people. This is like to influence the physical and behavioral outcomes.
The Redco company is just like a part of microsystem for the school children where they can learn directly by learning skills for manufacturing.