Evolution: The theory has been first formulated by Charles Darwin in 1859. It is defined as the process through which organisms change with time as a result of changes in heritable behavioral or physical traits.
Four principles in evolution:
1. Variation
2. Inheritance
3. Selection
4. Time
There are three main types of evolution i.e, convergent, divergent, and parallel evolution.
Explanation: The 17th Amendement allows voters to vote for U.S. Senators. Before the passing of this Amendment, Senators were chosen by state legislators.
Benjamin infant niece hides her face as the stranger smile at her. The reaction is common at the age of 9 months because during this period a child gets to recognize people around him or her. She will be shy to unknown persons and hesitate to mix with them. In the same time, Benjamin niece looks back as the women after hiding her face in his shoulder because she is also curious about that person who is outside her family.
