Darius is learning the names of two or three new objects or events every day. This rapid increase in vocabulary is referred to as the explosion.

A. Naming Explosion  

Explanation:

In most children a naming explosion occurs around 18 months that causes an sudden increase (Word Spurt)  in their spoken vocabulary. It can also occur between 15 and 4 months.

The children who do not " sprut" at all also have normal language development, during word spurt children also understand that all things have names, they also start to learn the meaning of words  after hearing it few times and mapping its earning.

it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.

rain should be the answer.