Throughout the night a person usually dreams for about one and a half hours. Many people say that they don’t dream, or that they rarely dream. Doctors have studied the sleep and have found that everyone dreams — in fact, every person needs to dream in order to keep healthy.

How many human studies do give strong scientific backing to the long held belief that eating fish can provide health benefits, particularly to the heart
A) Three. C) Four.
B) Two. D) One.