Answer:
Random assignment.
Explanation:
Random assignment (also known as random allocation, or randomization), in psychology experiments, is randomly selecting participants or units by the use of chance procedures so that each participant or unit has the same chance (equal likelihood) of being assigned to any particular control or treatment group.
Answer:
a substance that provides nourishment essential for growth and the maintenance of life. Examples include proteins, fats, carbohydrates, vitamins, and minerals.
Explanation:
These are the dictionary definitions so i would recomend paraphrasing. Hope this helps
