Viruses, although not considered to be alive, attack host cells and cause disease. The attack of a host cell is necessary for the virus to survive for all of the reasons listed EXCEPT one. That is

A) they cannot synthesize proteins because they lack ribosomes and must use the ribosomes of their host cells to translate viral messenger RNA into new proteins.
B) they cannot produce or store energy in the form of ATP and have to get their energy from the host cell.
C) they parasitize the host cell for basic molecules like amino acids, nucleotides, and lipids.
D) they lack DNA/RNA so they must use the DNA of the host cell

i think that the best answer would be c.

tell me if im wrong : )

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

im not intirely sure but i think the anwser is d relative humidity