Which statement is a central idea of “zlateh the goat”?

a. aaron relies on zlateh for milk, and zlateh eats the hay.

b. human beings often need the of animals in order to live.

c. the snow storm is ferocious, and aaron and zlateh fear they will not survive it.

d. a perilous storm forces zlateh and aaron to burrow into a haystack for safety.

It is false that during exercise, the oxygen concentration in the blood increases to twice that of resting levels. As a matter of fact, the oxygen either stays the same or decreases, or it may increase slightly than it used to be when the person was resting, but it definitely does not double while exercising. Hope this helps. Let me know if you need additional help!