C. Hardness is the answer
Sound waves enter the outer ear and pass into the ear canal where the waves cause the eardrum to vibrate.
Hope this helps you.<3
the internal structures provide shapes and support to a variety of living organisms both unicellular and multicellular
Answer:
True
Explanation:
A testable qustion has to be able to be tested useing experiments
I did this one at school and the answer was: produces water
