Answer:
Vaccines stimulate the body's own immune system to protect the person against subsequent infection or disease." ... The immune system develops antibodies to the disease so that it cannot make you sick again. Immunization describes the actual changes your body goes through after receiving a vaccine.
Explanation:
if we will grow huge number of trees and other plants the oxygen level will increase because tree produce oxygen during the process of photosynthesis and if one gases level will increase then other will also decrease...
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Earth is always rotating around the sun that means if it were winter on one side of the world, (that is not on the side of the sun) the other side of the world would be summer, ( the side that the sun is shining on)
I believe the answer would be D. If a plant were to have poisonous parts it could me the possibility that a child could become seriously ill.