The correct option is "glass ceiling" (note: its "glass" not "grass")
The glass ceiling effect is a term that refers to a metaphorical and invisible (just like glass) barrier that keeps women and other social minorities from being promoted and climbing up the corporate ladder to CEO and other top managerial jobs at organizations they work at.
It divides the earth into eastern and western hemisphere
The correct answer is permit
In almost all cultures it is forbidden to have relationships within an intimate kinship group. Incest is not accepted in most cultures. Cases are not legitimized and, when they occur, individuals are penalized.
But in some cultures incest is allowed and there is no punishment or way to outlaw the practice.