Answer:
Because, Air (or any gas) takes up space in water, just like solids. Air (or any gas) is less dense than water, so gas bubbles float to the top of water.
The correct answer is:
A. A group of related parts that work together to achieve a desired result.
I hope this answer was helpful!
Protists obtain food in one of three ways: absorption, ingestion, and engulfing. Most protozoa are free-living in soil and water and enter the activated sludge process through inflow and infiltration. Bacteria are the primary food source for protozoa
The answer is b. North Atlantic drift, hope this is right
