Answer:
A. an Allee effect.
Explanation:
Allee effect: In biology, the term "allee effect" is described as one of the phenomena which are distinguished as a specific correlation that exists between the mean of individuals fitness related to a particular species or population and the population density or size.
The main cause of the allee effect is the genetic mechanism.
In the question above, the given statement signifies an allee effect.
The villages were made up of extended families and were governed by a chief, council, or elders.
Answer:
Antonio López de Santa Anna
Explanation:
The following is from Wikipedia:
In 1835, Santa Anna repealed the Mexican Constitution, which ultimately led to the beginning of the Texas Revolution. Santa Anna's reasoning for the repeal was that American settlers in Texas were not paying taxes or tariffs, claiming they were not recipients of any services provided by the Mexican Government. As a result, new settlers were not allowed there. The new policy was a response to the U.S. attempts to purchase Texas from Mexico.