Which is a result of seasonal change (meaning a change that happens over and over at a certain time of year)? A. Bears hibernating in a cave during cold periods B. Raccoons fleeing a forest fire C. Fish moving away from a polluted area of a stream D. Grass growing quickly after a rainstorm

A.

Explanation:

All other options are simply situational, while cold periods are usually seasonal.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."