Answer:
Hot air rises. Cool air comes rushing in to take its place.
Explanation:
Answer:
Migration.
Explanation:
When an individual leaves an area, they are migrating.
It is NOT C, I got that wrong when I chose C.
Answer:
Clean rooms are used for biological research in order to prevent the research from contamination of other microorganisms.
Explanation:
Rooms were cleaned before any biological research in order to reduce the intervention of other microorganisms in the research and made the research proof from any impurities. These labs have high atmospheric pressure which decline the growth of microbes and the research will be done in a better way.