Question

to provide evidence to support a claim
sporadic
capricious
substantiate
obsolete

Explanation:

The phrase "To provide evidence to support a claim" matches the definition of the word "Substantiate", which means to prove or support a statement, claim, or argument with evidence. The other words have unrelated meanings: "Sporadic" means occurring at irregular intervals, "Capricious" means impulsive or unpredictable, and "Obsolete" means no longer in use.

Answer:

Substantiate