Answer:
Their digestive systems produce methane, a powerful
greenhouse gas
Answer:
The mass of liquid comes out to be 82 g.
Explanation:
Given density of liquid = 1.64 g/mL
Given volume of liquid = 50 mL
The relation between density and volume is shown below

Mass of liquid = 
Mass of 50 mL liquid = 82 g
The answer is heat, water has a high specific heat and is able to carry a lot of energy.