Sound waves are sent out buy the animal/or vessel using sonar and the animal/vessel uses the echo from the original Soundwave that was sent out to determine the distance and size of the object that it hit
OK! We'll do process of elimination... Here we go!
A.Legal drug use- Definitely not! You're not allowed to share your pills with ANYONE!
B.Legal drug abuse: From the word abuse, we know that abuse is not legal. So take that one out!
Now, skip C and go to D.
D.illegal drug use: Well this drug is legal. So cross this off.
C.illegal drug misuse: Ding Ding Ding Ding Ding! It's not an illegal drug, but no one but the person who the drug is for is supposed to take the drug. So yes, it is misuse.
Hope this helps! Have a great day!