I think the answer is Traction
Answer: The use of water is increasing day by day and the amount of freshwater available for the daily use is less than 1%. There are thousands of activities going on in this 1 % of water only. There is a huge of amount of water present on earth but that cannot be used because of being salty. The use of water is a concern because most of the water is wasted that water is freshwater only. The water used for brushing, bathing, agriculture, etc is freshwater only. Water should be used in a sustainable manner to fulfill the demand of present generation and save for future generation because life is impossible without water.
The dependent variable would be the heart rates of her classmates.
Meiosis :) hope this helps
