A Mutually Favorable Interaction Between Organisms

This page is the CodyCross answer for the clue below from African grasslands, Group 1553, Puzzle 4 (Safari Excursions).

Question is: A Mutually Favorable Interaction Between Organisms

and the answer is: SYMBIOSIS

Word Meaning:

SYMBIOSIS — A relationship of mutual benefit, especially among different species.

Definitions from Wiktionary.