Please answer as many as you can this is just a study guide

01. the continued existence of organisms that are best adapted to their environment, with the extinction of others, as a concept in the Darwinian theory of evolution.

02. It shrinks as species begin fighting for resources.

03. The animal will experience a lack of growth.

04. Level 1: Plants and algae make their own food and are called producers. Level 2: Herbivores eat plants and are called primary consumers. Level 3: Carnivores that eat herbivores are called secondary consumers. Level 4: Carnivores that eat other carnivores are called tertiary consumers.

Explanation:

just here for the other one bc they put up with u