The answer to this question would be: an organ
A group of a similar cell will make a tissue, but a group of tissues will be called an organ. In the organ, there is various tissue that will work together to do a function.
In the heart, the muscle tissue will contract and pump the blood. The connective tissue will make the valve so the blood will be pumped in one way direction. Every tissue will do different jobs and if you lose one of them it will decrease the organ capability.
Answer:
I believe it's A and B
Explanation:
Hope my answer has helped you!
first pic
its the one with the cigarette and the spray
second pic
its the one that says that it supports marine life