The boundaries around the Mississippi river on the west side, Canada on the north, and Spanish Florida on the south
Answer: Bottleneck effect
Explanation:
The bottleneck effect is terms of population size is one of the concept in which there is large reduction in the population size due to the various types of environment related factors and also due to the human activities are as follows:
- Floods
- Droughts
- Fires
- Earthquakes
- Planning of the human population
According to the given question, Bottleneck effect is one of the congestion point in which the large number of species or we can say that population is killed and it also increase the genetic drift. So, the above given situation is illustrating the concept of bottleneck effect.
Therefore, Bottleneck effect is the correct answer.
The correct answer is C. W.E.B. Du Bois (scholar and activist) was one of the most important African-American activists and the best known spokesperson for African-American rights of the first half of the 20th century. He was the co-founder of the National Association for the Advancement of Colored People (N.A.A.C.P.) and a supporter of Pan-Africanism.
Answer:
Norm of reciprocity
Explanation:
The norm of reciprocity, also known as the rule of reciprocity is a social norm that leads us to reward behaviors from people that have been helpful to us. It compels people to return favors when they think they have been helped. This social norm in some cases leads to people wanting to ensure that a negative behavior shown towards them is punished.