Making of faces - this is the correct answer in this case because the movement of either food or blood or beating of the heart for that case don't involve voluntary muscle movement. On the other hand, when're making faces, we're deliberately deciding whether we want to make a face and what face we want to make. hope this helps :)
Sample b is the control group because it’s the group not being tested and being kept the same.
Evaporation is the process that allows water to enter into the atmosphere. Sunlight turns liquid water into water vapor which then rises higher into the atmosphere and forms into clouds.
Answer:
As the temperature of the water decreases from 4°C to 0°C, the density decreases slightly.
Explanation:
platos answer.
