Final answer:
Fraternal polyandry, where a woman is married to two or more brothers simultaneously, is a true practice mainly found in Nepal, serving purposes like preserving family land and minimizing population growth.
Step-by-step explanation:
Fraternal polyandry is indeed a marriage pattern in which a woman may be married to two or more brothers at the same time. This practice is known as polyandry, which is a form of polygamy where one woman has multiple husbands. In this particular form, known as fraternal polyandry, biological brothers share a single wife. It is most commonly found in Nepal and is practiced by a minority of families, particularly in rural areas. The main reasons for this practice include ensuring that family land remains intact and undivided, reducing inequality within the household, and minimizing population growth in regions with scarce resources.