What part of the brain is known as the pleasure center?
A. Brain stem
B. Hypothalamus
C. Thalamus
D. Midbrain
SUBMIT

Select all the true statements about the cosmic microwave background radiation

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Ascientific idea becomes valid when it is what?