Obedience, because the dog should know when to attack and when to call down
I think it’s respiratory but I’m not sure
Answer:
2000
Explanation:
It is very close between 1990 and 2000, but from what I can see, 2000 had the least precipitation.
I am going with x-rays; it is the most visible to the naked eye out of all the choices.
I believe it is D) heliocentric !
