At what point in history did the human population reach its peak growth rate? select one: a. 1900-1920 b. 1940-1960 c. 1965-1970 d. 1970-1985

c. 1965-1970

Explanation:

It took over "2 million years" for the human population to reach 1 billion, but once it went past the 1 billion mark, it only took another 200 years for it to reach "7 billion". In the late 1960s, the "human population growth rate" had reached its peak where the population growth rate had gone above 2.5% a year in the developing countries. The population growth rate of the entire world had reached a little above 2% a year back then.

My answer is letter d

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.