Question

What is the defining feature of a system?
A. properties that don’t change
B. collision
C. interaction
D. gravitational force

Answer 1

@Haseeb96

Answer 2

i can help you

Answer 3

Not all systems involve collisions or gravitational force (although many do!), and just having properties that don't change doesn't make a system (think of a single inanimate object sitting on a table). But all systems have some sort of interaction going on within them. so your answer would be interaction