Which of the following sustainable practice

c?

Explanation:

i believe these may be the options . if i had to guess, it would be c  

A)  

Leaving trash bags at a local park

B)  

Throwing jars in the trash can

C)  

Using only geothermal energy

D)  

Flushing medicine down the toilet

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.

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