D)independent
Explanation:
An independent variable is a variable that is changed to test the prediction in an experiment. Independent variables are the cause in an experiment. They are the ones that produces the effect.
- Changing independent variables produces different effects in an experiment.
- These effects are the dependent variables
- Independent variables do not depend on the outcome of the experiment.
- They are the ones that determines how a reaction proceed and what might likely happen.
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Answer: a). growth
Sleep is a necessary biological activity shown by most of the living creatures. It is the primary activity of the brain. During sleep the blood supply to the muscles increases, the energy of the body gets restored, repair and tissue and growth takes place. Important hormones are released for the process of growth and development.
Therefore, sleep is necessary for growth is a correct option.
