Ascientist is studying two different kinds of the same species of fly that live around a lake. the scientist calls these two different kinds of flies type x and type y. both of these kinds of flies live near water and thrive in the same kinds of weather conditions. the two types of flies look similar, but type x flies are, on average, 20% larger than type y flies.

over a period of five years, deforestation occurred in an area about 50 km from the lake. this caused animals from these areas to move into wooded areas closer to the lake. the bar chart below shows data about the amount of deforestation that occurred in the nearby forest. the scientist collected population data on the flies. this data is shown in the graph below.

the answer is A.Flies with larger body sizes were less able to survive when deforestation increased.

Explanation:

a time line cause it goes from 685 to 978

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.