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)

answer; by working independently, the states have a high likelihood of developing innovative solutions that can be employed in other states;

the united states has a federal government. the president is the head of the federal government of the united states. however, each state forms its government for administration purposes. the powers of the state governments are exercised within restricted state boundaries. and citizens participate in this government by voting.