A.they are similar to humans in dealing with colors |
B.they are easy to observe and study |
C.they are sensitive to colors like human beings |
D.they are active at night and sleep during the day |
A.They drink less sugary water. |
B.They don’t sleep well. |
C.Their eyesight becomes worse. |
D.Their energy level becomes low. |
A.Dim light | B.Red light |
C.Blue light | D.Darkness |
A.Not being exposed to dim red light when using computers. |
B.Equipping their computer screens to put it more in the reddish light. |
C.Living or working in low levels of light overnight. |
D.Going to see doctors of clinical depression regularly for help. |