They are pools of money that are managed by an investment company. they offer investors a variety of goals, depending on the fund and its investment charter.

Mutual Funds

Explanation:

Mutual funds are a kind of financial agency constituted of a pool of capital gathered from several investors to buy securities such as stocks and bonds. A mutual fund is run by a manager who allocates the fund's capital to make investors´ money grow, so every shareholder shares both the profits or losses of the fund. Each mutual fund has specific investment objectives.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

the first one is d and the second a