When individuals in a population of the same species compete against each other for resources, it is called competition

It is called direct competition.

Explanation:

Competition arises when living organisms including animals, plants and microorganisms need limited resources to thrive in their choose environment. Competition can grouped into interspecific, intraspecific, direct and indirect competition. In direct competition same species compete directly for similar resources like mates, food, space etc. Few examples include

1. a pair of male penguin battling for a single female.

2. A pair of male lion battling for a pride.

b) the planets year length would be longer

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