Several unrelated species of spiders have evolved social behaviors presumably in response to selective pressures brought on by high density. The closest relatives of these spiders lack these behaviors. These social behaviors are likely examples of convergent evolution, which is a form of .

homoplasy

Explanation:A homoplasy are characteristic shared by a particular group of species but these characteristics did not originate from a common ancestor. These characters have evolved independently. A homoplasy is the opposite of a homology, homology and homoplasy

both refers to biologically shared characteristics amongst species but in homology these shared characteristics are from a common ancestor whilst in homoplasy the shared characteristics are not from a common ancestor ,they originate independently.

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