Psych a 20 year old college student is heterosexual his brother brett is homosexual the brothers obviously differ in their

sexual orientation.

Explanation:

sexual orientation -

It refers to the identity of a person to get attracted to a male , female or both , is referred to as sexual orientation.

The process is gender dependent practice.

Where  a homosexual person is supposed to be attracted to people of same gender ,

where as a hetyerosexual person gets attracted to opposite gender.

And ,

Bisexual is supposed to get attracted to both the gender .

Hence, from the given scenario of the question,

The correct answer is sexual orientation .

answer; the correct answer is (composition);

we need the diagram to answer this correctly.