Mammals are adapted to live in D - all of the above. Mammals are, infact, very versatile groups of species which have evolved in a way that also itself enables their versatility. For this reason, mammals have been able to roam the different parts of Earth and thrive in that environment.
Glycerides of higher fatty acids are oils are fats. Oils are liquids while fats are solids at room temperature or at 25 degree Celcius. Oils have some unsaturated acids forming triglycerides while fats are glycerides of mainly saturated higher fatty acids. Hope this helps.
B, the earth because there is a limit of how much matter is exchanged
the study of classification is called taxonomy.