He specifically walked on water during a storm, and assuming he wasn't violently moving up and down, he was moving independently of the water, so i expect he would stand still
Its specifically when applying emphasis, usually with ((())), but not always. Using the word they on its own is not an issue, but in cases like this its usually better to say who you mean, instead of letting people assume.
From the pov of an organism in a high-oxygen atmosphere, thats true. But on a planet with little to no oxygen in the atmosphere, it would have to be added separately, the same way we add fuel
Yes