Cells use oxygen to assist in cellular respiration. This type of respiration, called aerobic cellular respiration, converts stored energy into a usable form. The first stage of aerobic cellular respiration, glycolysis, can be performed without oxygen.
A persuasive speech is a specific type of speech in which the speaker has a goal of convincing the audience to accept his or her point of view. The speech is arranged in such a way as to hopefully cause the audience to accept all or part of the expressed view.
These same skills can be applied to writing. Persuasive writing is a type of non-fiction writing used to convince the reader to agree with the author about an issue. This is non-fiction writing in which the writer will not use their personal opinion, but actual facts to convince the reader to agree with them.