1. B, natural resources are anything that is not manmade and forests are natural, not artificial, so they are a source of natural resources
2. D, human capital consists of skills that help people advance in life and realize that they can be productive members of society
3. A, capital goods are goods that are used in producing other goods, so auto parts are good that are used to make other machines or mechanics so that would be an example of a capital good
4. C, entrepreneurship is creation, working by yourself or other people to create something new for a business, usually comes with a risk
Hope this helps :)