Because all those energy sources are natural and will always be there, when ever there is a need for extra energy.
B! The strongest characteristics will survive when the weak ones won't
This is true , trees loose their leaves as a part of growth, also in seasons they loose leaves.
The farmer is attempting to apply the principle of conditioned taste aversions to accomplish his objectives. Conditioned taste aversion occurs when an animal associates the taste of a certain food with symptoms caused by a toxic, spoiled, or poisonous substance. Generally, taste aversion is developed after ingestion of food that causes nausea, sickness, or vomiting.Tate aversions is an important principle that help us better understand animals and people tend to form one pairing associations between a certain stimuli, unlike other classical conditioning examples, for it one eats a food and becomes ill, he or she is predisposed to avoid the substance.
b. the burning of fossil fuels for energy and transportation
