Complex sentence: No simple, single cause for sexual orientation has been conclusively demonstrated, and various studies point to different, even conflicting positions, but research suggests that sexual orientation is a combination of genetic, hormonal, and environmental factors.
Split into simpler sentences: No simple, single cause for sexual orientation has been conclusively demonstrated. Various studies point to different, even conflicting positions, but research suggests that sexual orientation is a combination of genetic, hormonal, and environmental factors.