What are the Ninth and Tenth amendments referred to as? Which institution do these rights allow to create more rights?

Popular sovereignty

Explanation:

The ninth and tenth amendments basically say that any powers not listed as the federal governments is reserved for the states and people. So, when your question asks what institutions do these rights fall under, it would be the states and the people.

You also seemed a bit confused about the rights part, so let me make up a random example. Lets say that the constitution doesn't say that...the federal government can put limits on cheese. Because this power isn't listed as a federal, then the power to determine what cheese is legal goes to the states. Sorry if you like cheddar, I guess :( If you wanted a serious example though, the rights to drug regulation isn't exactly mentioned as a federal power, hence why florida has legal marijuana and other states dont!

Anyway, I hope this somewhat helped!

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

the percentage of students at the school need special diets is

c) 10 percent