All of the following patterns were witnessed by darwin except that species vary
a. within very short spans of time.
b. over time.
c. around the world.
d. locally.

A. within very short spans of time. 

The natural selection process ensures that the weak members or traits of organisms are removed so that only the strong will remain. This ensures that the organisms and their descendants will live for as long as possible. This is the process by which organisms evolve to allow for higher survival rates. For example, an animal that is covered by thick and multiple layers of fur is made for the extremely cold climates. However, if the world begins to get warmer and warmer, such animals and their offspring will begin to have thinner and thinner layers of fur. This will allow their specie to survive longer. 

The correct answer is letter A.

Darwin observed all of the other choices in evolution except letter A. Evolution does not occur in very short spans of time but rather the opposite. Evolution in environments occurs in long periods of time where species develop certain behavioral and physical adaptations to help them thrive and survive.

Ihaven't done that yet, so no idea,but this is not the right place to ask

Plants take energy from the sunlight with the of chlorophyll so the plant starts the food chain. then an herbivore eats the plant and gets its energy.then a carnivore or a human eats the herbivore and gets its energy. : )