Following factors influenced the biosphere

These too hot or too cold conditions may not have supported the life. Other smaller factors like climate, humidity, precipitation, temperature, erosion etc. change the land and living conditions around the living organisms.

summary - a brief statement or account of the main points of something.

main idea - the main idea is defined as the main point of a speech or piece of writing.

paragraph - a distinct section of a piece of writing, usually dealing with a single theme and indicated by a new line, indentation, or numbering.

the correct answer is option d. the nature of democracy. on november 19, 1863, president abraham lincoln delivered his famous gettysburg address in gettysburg, pennsylvania. in his speech, rather than focusing on details of the war (soldiers, casualties, aftermath of battle), lincoln invoked the very nature of democracy, that power ultimately comes from the people, when stating, “government of the people, by the people, for the people shall not perish”. these words mean that democracy is a government by the people (citizens) in which the supreme power is vested in the people and exercised directly by the people or by their elected representatives for the benefit of all citizens. the survival of democracy in the united states is one of the reasons why this speech so significant today.