2.     when an animal receives a vaccine, about how long will it take before the animal's immune system will protect the animal from disease?           a. two days    b. two hours    c. two months    d. two weeks

The answer is option A.

Explanation:

The resistant framework attempts to keep germs out of the body and wreck any that get in. The safe framework is comprised of an unpredictable system of cells and organs that shield the body from contamination. Lymph hubs are a piece of the safe framework. They discharge lymphocytes, a specific sort of white platelet that battles infection.The safe framework ensures the body against sickness or other conceivably harming remote bodies. When working legitimately, the insusceptible framework recognizes and assaults an assortment of dangers, including infections, microscopic organisms and parasites, while recognizing them from the body's very own sound tissue.

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation: