Answer:
The correct answer is -
Competition  
availability of food
Explanation:
Density-dependent factors can be either a positive or a negative correlation to population size. These factors depend on the size of the particular population. They can increase or decrease or limit depending on the change of the size of the population. 
Competition is one of the density-dependent factors that occur when reaches a high density, then there are multiple contenders for a single resource.
Availability of food - availability of food also depends on the size of the population if the population increases the availability of food is decreases or limit.
 
        
             
        
        
        
Answer:
Omnivore are animals and human beings who eat both meat and vegetables 
 
        
                    
             
        
        
        
When its heated it expends
        
             
        
        
        
Answer:
Dictionary Definitions:
the number or quantity of people or things that can be conveyed or held by a vehicle or container.
If it's ecology: the number of people, other living organisms, or crops that a region can support without environmental degradation.
Explanation:
I don't know if you're talking about an ecosystem or not but that's the dictionary definition (:
 
        
             
        
        
        
There are a lot of human activities that gives negative effects on the earth's ecosystem but I will mention only four: Burning of things such as garbages or plants and trees, dumping of garbages anywhere, chemical substance that are being made and produced, cutting down of trees for replacement of buildings and homes. The human activities increase the occurrence of species extinction by doing this, it eliminates and destroy the homes of the species that are supposed to be living on their natural habitat. But instead of them, living peacefully, by doing these activities, their home will be destroyed that can kill them-- which can lead to extinction.