The answer would be C, "The earth is heated by terrestrial radiation."
Terrestrial radiation is a factor in what heats up the earth and it's a major factor in the study of global warming.
The thread of protien called A. Fibrinogen helps form clots.
B the warmth from your hands us being transferred
Sun provides energy to plants, which use it to make food from soil nutrients, which is eaten by animal, which is eaten by another animal, that produces waste and die, that decomposes and adds nutrients to the soil, which plants use with sunlight to make food from soil
Chlamydia is a disease transmitted by sex with someone infected. Its caused by bacteria and often is asymptomatic.
Treatment is with antibiotics, and it's essential to know if one is infected because in women can cause infertility, and in males can cause urethra complications like inflammation and obstruction.