nflammation . Inflammation . is caused by bacterial activity to enhance the spread of disease slows the healing process with swelling that can impair bodily function is caused by viral activity to enhance the spread of the disease brings more leukocytes to the site of infection

brings more leukocytes to the site of infection

Explanation:

Inflammation is an immune response to harmful stimuli such as injury or infections (i.e., pathogens). The inflammatory response is produced through the movement of plasma and leukocytes, also known as white blood cells, from the blood into the injured tissues. Leucocytes (i.e, granulocytes/neutrophils, lymphocytes, monocytes, etc.) are cells of the immune system that work together in order to eliminate the infectious agent by phagocytosis and/or to clean up injured tissues.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.