How does fever indicate that your body's immune system is doing its job?
a. fever increases white blood cell production.
b. fever raises the body's temperature to destroy harmful substances.
c. fever triggers inflammation.
d. fever causes the secretion of hormones that fight harmful substances.

Fever raises the body's temperature to destroy harmful substances. (Option B)

Explanation: Fever also called pyrexia is one of the most common complains in the medical practice. It is defined as the body temperature that is above normal range (for that individual) without any physiological cause to it. This is usually above 38 degree Celsius recorded by the thermometer .

When body suffers from certain pathological process namely “inflammation” certain chemicals are released in the body called pyrogens e.g. which is interleukin-2. white blood cell called  macrophage is also activated, and the body temperature rises which indicates that the immune system is doing its job.

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!