Plant populations change over time by growing in size and diversity. They generally are the first part of an ecosystem after lichens (the pioneer species) and cause an ecosystem to flourish and allow for animals to move in. I don't know if this is the answer you were looking for but it should give you somewhat of a base.
Answer:
The correct answer is D. The Works Progress Administration was able to build or renovate 110,000 public buildings (schools, post offices, government office buildings) and for constructing almost 600 airports, more than 500,000 miles of roads, and over 100,000 bridges; it also kept an average of 2.1 million workers employed and pumped needed money into the economy.
Explanation:
The Works Progress Administration was a government agency established during the Great Depression by President Roosevelt to help solve the massive unemployment problem at the time. It was the largest of the government agencies in the history of the United States created to set up relief and public works.
From 1935 to 1943, it provided jobs for about eight million people, costing about $11 billion. In almost every community in the United States, there are parks, bridges, and schools funded by the WPA. By 1940, it had built about 4,383 new school buildings, improved another 30,000, built 130 new hospitals, and improved another 1,670 hospitals.
Its largest single project was the Tennessee Valley Authority, whose mission was to build dams in the Tennessee Valley for power generation. Camp David and the Golden Gate Bridge were also built by the WPA.
Elections in 1992 were canceled in <span>Algeria </span>when it appeared that Islamic fundamentalists would win.
hope i helped.
Hmm good question your answer is no
