Final answer:
The main point of a cause and effect organization in science writing is to explain the relationship between an event and an idea through stating a thesis or main point. Evidence and analysis are provided to support the claim.
Step-by-step explanation:
The main point of a cause and effect organization in science writing is to explain the relationship between an event and an idea. This is usually done through stating a thesis or main point that highlights the cause and effect relationship. For example, a thesis statement might state that 'increasing levels of CO2 emissions cause global warming'. The writer would then provide evidence and analysis to support this claim.