Answer:
Virus
Explanation:
Viruses are even smaller than bacteria and require living hosts — such as people, plants or animals — to multiply. Otherwise, they can't survive. When a virus enters your body, it invades some of your cells and takes over the cell machinery, redirecting it to produce the virus.
There's no options included so, I'm going to take an educated guess: insurance. (apologies if it's wrong)
~Hope that helped & Good luck!
Collaborative Learning has a common goal, which has to be build together with all learners. In Cooperative Learning the learners were divided. Each has his own part of the problem. The interaction consists of supporting mutualy.
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