Questions

The Bantu were comprised of more than 500 ethnic groups of Africa for migrations. The Bantu were experts in the form of iron metallurgy. 

The study of volcanoes, lava, magma, and related geological, geophysical and geochemical phenomenas is called Volcanology.

The country Brazil is the largest producer of sugarcane in the world.

Wind is the flow of gases on a large scale. On the surface of the Earth, wind consists of the bulk movement of air. The force that generates wind is called as Pressure gradient force.

A protein that acts as a hormone is INSULIN.

Insulin is a peptide hormone produced by beta cells of the pancreatic islets; it is considered to be the main anabolic hormone of the body.  Insulin helps keeps your blood sugar level from getting too high or too low.  

Assessing opportunity cost involves making choices and dealing with consequences.