Which of the following is the best definition of a pollutant?
a. a natural resource that humans overuse
b. a human activity that destroys habitats
c. a harmfal substance released into the environment
d. a species that humans introduce into an ecosystem

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

In the practice of science, this type of reasoning is used to develop explanations.

Creating new things to solve problems and improve life depends on the close interaction of which two fields?