Which statement is correct about insects that undergo complete metamorphosis?
a.
there are three distinct stages.
b.
during the adult stage, the insect forms a cocoon.
c.
during its life cycle, the insect changes its appearance dramatically.
d.
the larva's form resembles that of the adult.

That is

Immunization is the introduction of a foreign substance to provoke  the immune response system.  immunizations are the same as vaccinations. it introduces foreign (but dead/ weakened) illnesses to train the body to fight against them. specific viruses and bacteria have specific antigens, antigens act sort of like name tags. these name tags the immune system recognize what's dangerous to the body and what's safe. 

False. blizzards, floods, and droughts are not natural disasters. (i believe).