For competition to exist within a population or between population, shared or common resources that organisms holds very important must be very limited and scared.
Competition is a struggle between organisms for limited resources in the ecosystem.
It is an interaction between organisms in which one of them is harmed.
Competition originates from limited supply of shared or mutual resources among organisms.
When competition is between organisms from different population, it is called an interspecific competition.
Competition between organisms within the same population, i.e of the same species is intraspecific competition.
