It's empty or fairly large, making the sounds from your hands bounce of the walls and therefore having it echo
Annswer:
a egg
Explanation:
This is the answer because vacoules are like cells and eggs are like cells and yeah.
Sorry about the explanation I have to get points. But here are comparisons between the 3.
Answer:
a person who purchases goods and services for personal use.
Explanation:
First one, disease causing microorganisms