The mouse population of an area decreased last year. which abiotic factor would explain the population decrease?

a decrease in rainfall

Explanation:

A decrease in rainfall can increase the period and area over which the availability of food and shelter, for mouses, increases, initiating an increase both in the duration of the production season and in the survival of individuals for the next season.

The mouse population, at that moment, explodes and exceeds the capacity of its habitat to house the entire population, in addition, the amount of food available to this population is reduced.

The drop in the mouse population begins when insufficient food is available in the following season to support the colonizers in the receiving habitat and the population quickly reverts to a reduced level.

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.