A mutual fund is a tool in which savings of a number of people is pooled and then invested into stock and bonds. It is different from directly investing in stocks.
Though risk is reduced, mutual funds are still subjected to market risks. So, there is no guarantee of profits.
The investment is managed by assets managing companies. Though it helps in diversification, the control of portfolio goes in the hands of managers.
B. Specialize in this is because certain nations have different climates and different types of agriculture and livestock or even metals and rock productions than other nations do.