Which best states the theory of plate tectonics?

a. earth’s continents were once joined together as one landmass.

b. earth’s layers consist of the crust, the mantle, the outer core, and the inner core.

c. earth’s surface is made of different sections of rock that move apart and collide.

d. earth’s most active volcanoes and earthquakes occur in the ring of fire.

it is a learned trait

explanation:

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.