Which type of star cluster forms from tightly packed groups of older stars?

Which type of star cluster forms from tightly packed groups of older stars?

binary

eclipse

open

Its c

Explanation:

I did the quizz

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?