A claim is the statement which a person makes about a particular thing or person and it can only be validated when a supporting statement which backs up the claim is provided.
With this in mind, it is important that there is a valid supporting details used so that the claim is proved to be valid.
For example, if in a passage, a character mentions that "He is too tired to work" and we are asked to find a supporting detail to back this up, then if there's a scene that shows the character still lying in bed many hours after he is supposed to be up, then this is a good supporting detail.
Please note that your question is incomplete so I gave you a general overview to make sure that you get a better understanding of the concept.
Read more about supporting statement here:
https://brainly.com/question/20540884
