Your correct answer is D metals!
Ok, so the Answer is D. Wind because wind can be transformed into mechanical energy in the wind tube and the wind tube makes electricity.
The correct answer is chloroplast. If an organism has chloroplasts then it will be an autotroph because it will be able to make its own food by the means of photosynthesis. This is common for plants but there are some bacteria that can photosynthesize as well. If you don't have them you have to feed on other organisms that have energy for you.
NaOH is not a compound because it contains three instead of two.
