Besides antibodies are made after an active immune response. 1 point
Macrophage
Complement proteins
Antigen
Memory cells

Memory cells

Explanation:

Active immunity is defined as immunity to a pathogen that occurs following exposure to said pathogen. When the body is exposed to a novel disease agent, B cells, a type of white blood cell, create antibodies that assist in destroying or neutralizing the disease agent.

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

: )

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.