Long-term studies of certain species of squirrels in california revealed that some of the squirrels move nearly two kilometers from where they are born.

what influence would this migration have on the density of the local population they move into?

a. the density of the local population with increase
b. the density of the local population will decrease
cthe density of the local population will stay the same

The correct answer is option A, the density of the local population with increase

Explanation:

We can understand this from an example. Suppose there are two ecosystems A and B

Now in ecosystem A, 100 new squirrels are produced which later on move to a new ecosystem B (located at a distance of 2 Km from ecosystem A). Let's suppose the initial squirrel population was 100 in ecosystem B. After the migration of 100 new squirrel,  the new population of squirrel in ecosystem B becomes 200.  

Since population density in directly proportional to the population of a species, the increase in population of squirrel in ecosystem B , would definitely lead to an increase in population density of squirrel in ecosystem B

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.