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.
When writing a persuasive paper or preparing for a persuasive speech, you should begin by focusing on the main issue or problem that people disagree about. Try to separate personal judgements and emotions from your argument. The most effective persuasive argument appeals to reason, not emotion.