What is the main reason for interspecific competition in nature?

What is the main reason for interspecific competition in nature?
  1. Competition among closely related species for limiting resources
  2. Inhibitory presence of one species on the feeding efficiency of the other species
  3. The process by which the fitness of one species is significantly lower in the presence of another species
  4. The extinction of one species due to the introduction of another species

Solution

Although the first statement is true, it's not entirely true. The competition can occur when closely related species compete for the same resources that are limiting, but competition can also occur between unrelated species and resources need not be limiting.

Asked in: NCERT

Practice more Organisms and Populations questions on Aicharya