Which characteristics can be used to differentiate star systems? Select three options. 1( the number of stars in the system
2( the level of dust and gas
3( the age of the stars in the system
4( the way stars are organized in the system
5( the color of stars in the system

Don't mind the subject btw.

 The age of the stars in the system.

Explanation: All stars have different ages; Stars take on certain forms depending on their age, causing a difference in their looks. Thus making #3 as your answer. ( The age of the stars in the system)

the 4th option is the answer

answer; cattle ranching on the savanna,and forestry in the amazon;