I need help for all of them plz help me asap

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone