Please help may decide if i fail my grade

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing

Why do we perceive objects as retaining their brightness under different lighting levels?

A(n) is a molecule influences the way that a molecule reacts.