4. It makes the resource available for use
They help ensure that the changes of the independent variable are affecting the dependent variable
<span>Answer:
Greenhouse effect; carbon cycle affect how important a particular greenhouse gas is in contributing to the greenhouse effect.</span>
As her body's metabolism becomes more active, A. Ellens body will force her to slow down by cramping her muscles. A buildup of lactic acid will occur in Ellen's muscles, causing severe cramping.
