Scientists make observations, conduct experiments, and draw conclusions. Which statement is true of all scientists? Scientists study living things.
Scientists study the natural world.
Scientists study items found on Earth.
Scientists study things found in outer space.

study the natural world

C, Scientists study the natural world

Explanation:

Science studies the natural world. This includes the components of the physical universe around us like atoms, plants, ecosystems, people, societies, and galaxies, as well as the natural forces at work on those things.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).