A person who has AIDS contracts rare and often life-threatening infections because their helper T cell count is so low. Which of the following components of the immune response still respond to antigen despite the low helper T cell count?
A) Clonal selection of B cells
B) Apoptosis of infected host cells
C) Clonal expansion and antibody production

b. lithosphere, asthenosphere, mesosphere   is the answer most likely

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: