I believe the answer is biological.
Answer:
D. The Berlin Wall was built
Explanation:
Bad planing communication and not enough troops
Answer:
It represents the PROBABILITY OF EVENTS.
Explanation:
The probability of an event show how possible, an event can occur.
It is the number of favorable outcomes divided by number of outcomes that are likely to occur.
It is the ratio of how many times favorable outcomes occur to number of times possible outcomes occur.
It is the proportion of times event occur.