Even an expert should not attempt to cover more than one topic in a paragraph. true or false?

True

Explanation:

While you start writing you have to remember all the tools that you can use, and those are the ones that you can use for giving the reader the message and idea that you want. You don't want to confuse your reader and covering several topics in a paragraph. That would make your paragraph weak the whole point that you want to explain there will be miss.

First for the introduction of the paragraph you should introduce the topic sentence on it, you can also there provide some background information.

There in the body you can use facts of the topic and make the paragraph more strong using analysis, arguments or examples of the main idea.

Finally and not less important, in the conclusion you can match the ideas from the introduction and the body of the paragraph. That would give your paragraph and TOPIC sentence a more organized and detail form.

If you wanted to make that with several topics that would not end well. It would be hard to read and confuse the reader.

elon musk, ceo of spacex, a startup space company is planning to head to mars by 2023. nasa is planning to go to mars at around 2025. both are just for a basic colony.