Is the following thesis statement a fact or opinion:

nutrition experts claim that fresh produce is healthier than processed foods and refined sugars.

I'd say fact

Explanation:

It's a claim being made by a nutrition expert, who is someone who has studied that subject and would be a reliable source.

Opinion a claim means someone made the assumption of the topic

ok what is this for my man

a source card is mage during research to tell the facts about the source one is using.