In the early paleozoic era, life was restricted to the

In the early Paleozoic era, life was restricted to the sea.

Explanation:

The biological content of the Paleozoic Era was quite rich; it included numerous forms of aquatic life: algae, sponges, corals, brachiopods, bivalve mollusks, gastropods and cephalopods; Among the arthropods, the trilobites and the first insects stood out; aside, also the first arachnids and echinoderms. The vascular plants and pteridophytes (or ferns) developed in that era, especially abundant during the Carboniferous period. Also in this era appeared the first vertebrates, cartilaginous fish, amphibians and even the first reptiles.

Most of the plants and animals did not colonize land until the Silurian and did not prosper until the Devonian Era.

for the 2 countries u can do china and america because america has a democratic government while china has a communist government.

a democracy is a government run by the people either by directly voting or indirectly by electing representatives. an oligarchy is a government run by a few or a small group of people. a democracy and oligarchy are similar because both in an oligarchy and an indirect democracy, a small group of induvial determine the laws for a large group of people they are different because in an oligarchy it is easier to control and they do not have to answer to a large number of people in the country, unlike a democracy where they do have to answer to a large number of people an county that is a democracy would be the united states. a country that is an oligarchy would be the china.

a agree i agree becuase it is very importnat for example it can tlel you about your past for exmaple   the first culture was the semerians which people are sitll tryignt o uncover there secrets the wall is just anohter treasure that has thousnads of secrets in it to be uncovered