Why did the founding fathers have to add the Bill of Rights to the US Constitution?

The founding father worried that trying to spell out all of Americans' rights in the series of amendments could be inherently limiting.

Explanation:

Freedom of speech, religion and the press. The right to assemble, bear arms and due process. These are just some of the first 10 amendments that make up the Bill of Rights

a.) a poor farmer, due to the fact that they would want to be freed from british rule.