Which is a component of an effective paragraph in the body of a research report? author’s insights interwoven with facts no expert testimony informal language vague facts and details

The correct answer is author’s insights interwoven with facts.

In order to develop an effective body paragraph we need an author's insight that can be represented by a topic sentence, that gives an interpretation of a fact, an idea based on your sources. In well-developed body paragraphs, you have to provide a form of evidence, in a research report would be facts. Not only present them but make sure to interpret them for your readers.

we need the speech to be able to answer your question, reply with it and i'll reply with the answer.

the eye wink at the hand; yet let that be / which the eye fears, when it is done, to see.