Twenty fruit flies are placed in each of four glass tubes. the tube are sealed. tube 1 and 2 are primarily covered with black paper. tube 3 and 4 are not covered

It has to be b i hope this

Thermohaline circulation and gyres

Ithink its called the coefficent.

The surface of the water droplet is held together by the attraction between molecules. in order for water to flow more easily into these small spaces, you need to decrease its surface tension. you can do this by adding soap, which is a surfactant (a material that decreases the surface tension of a liquid).