LScientists are investigating the cause of the large increase in atmospheric carbon dioxide concentration since about 1800. Which of the following provides the best explanation for the increase? (SC.912.L.17.18)
A eruptions of large volcanoes
B. use of fossil fuels by humans
C. natural fluctuations of climate
D. photosynthesis by phytoplankton

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.

yes, because even though a theory has a  lot of evidence to support it, it is not always true

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101