Answer:
A. Making an observation
Explanation:
Before you can communicate findings, you first need to have findings. And before you can test a hypothesis, you first need to come up with a hypothesis, which can be done by first making an observation.
Bacteria can replicate themselves.
This is true because it's self pollination
Tumors are bunches of abnormal tissue growth, and they can constrict airways, and block your veins and arteries, causing them to be potentially fatal.
