False. They're vibrating strings. Drums have membranes (a membrane is like a sheet)
Option D would be the correct one!
Answer:
The spotted owl is an example of an indicator species, or an organism that shows the overall health of an environment. This could be an animal, like the owl, a bacterium, a plant, a fish, well you get the idea.
Force = mass × acceleration = kg × m/s^2 = Newton
