Please help me with this ill give a brainy thing if you get them right. please don't guess

five ecosystems should be desert , semi-desert, grasslands, forests and coastal environment

richard milhous nixon (january 9, 1913 – april 22, 1994) was the 37th president of the united states, serving from 1969 to 1974, when he became the only president to resign (quit). he is also known for corruption and the watergate scandal which resulted in the public losing trust in him and his resignation.