Amounts of radiation received over a very long period of time
Answer:
I believe it would be the 2nd choice
Explanation:
Abseiling, also known as rappelling from French rappeler, 'to recall' or 'to pull through', is a controlled descent off a vertical drop, such as a rock face, using a rope
There are instances
that when we are exposed to virus or bacteria, the antigen A in our body try to
fight but still we get sick, take some medication and we are then healed. Then,
another exposure to a new virus or bacteria, the antigen B reacts weakly for
our immune system do not recognized the foreign pathogen that invade the body
resulting to slight sore throat after visiting your sister at school.
