Reading, talking and walking.
Natural environment constitute all the living and non-living things present in the earth. Human's activities has destroyed the natural environment and the organisms living in that environment.
Deforestation, industrialization and urbanization has drastically affected the environment. Reading, walking and talking does not affect our environment because no energy is wasted or trees are cut down during these activities.
Thus, talking, walking and reading does not harm our environment.
Natural selection enables an organism to survive and reproduce in its habitat.
The term natural selection is used to describe the fact that organisms that possess traits that enable them to survive in their habitat and live long enough to survive and reproduce.
The following are descriptions of the types of natural selection listed in the question;
Results in the evolution of the species: Directional
Results in new species: Disruptive
Favors traits at the two extremes: Disruptive
No increase in diversity: Directional
One extreme trait is favored: Directional
Diversity decreases: Stabilizing
Diversity increases: Disruptive
Learn more about natural selection: brainly.com/question/4147359
It insulates to the fish from the cold air above