The correct answer is: a) Agriculture.
Livestock rearing in Meghalaya is often integrated with agriculture. This is because the state has a lot of hilly terrain, which is not suitable for large-scale agriculture. However, it is suitable for raising livestock, such as cattle, goats, and pigs. The manure from these animals can be used to fertilize the land, and the animals can be used to plow the fields. This integration of agriculture and livestock rearing helps to improve the productivity of both sectors.
Option b) Fishing is not a major industry in Meghalaya. The state does not have a lot of coastline, and the rivers and streams are not suitable for commercial fishing.
Option c) Mining is also not a major industry in Meghalaya. The state does have some mineral resources, but they are not exploited on a large scale.
Option d) Tourism is a growing industry in Meghalaya, but it is not yet integrated with livestock rearing.