Recent research on the maternal immune hypothesis and the prevalence of left-handedness among homosexuals suggests a strong role in sexual orientation.

Homosexuality

Explanation:

Right Answer is Non-right-handedness.Handedness and sexual direction. A connection among handedness and sexual direction has been recommended by various analysts, who report that hetero people are to some degree bound to be correct given than are homosexual individuals. Accoding the reserach human hand inclination concur that the side of the favored hand (right versus left) is created by natural and, probably, hereditary causes.  The studies of Left-handed people are increasingly handy with their left hands that around 10% of the total populace is left-given. Cross-predominance or blended handedness is the difference close by inclination between assignments. This is exceptionally remarkable in the populace with about a 1% commonness.