11.Which variable would be a dependent variable

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

c is the answer to this question. altitude affects the weather because air molecules evaporate.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate