Viruses are very small infectious agents that only replicate in living hosts.
Answer:
WARM UPS-
1. can prevent you from getting hurt of pulling a muscle
2.can help you mentally prepare
3.can help you with your breathing
Explanation:
COOL-DOWNS
1. your muscle can get cramped more easy
2.gets your heart rate to normal
3. makes you feel more refreashed that tired
A contract would fit that definition.
