Question

select the sentence where the writer states an opinion.
scientists have found that young children usually spend around four hours per day looking at computer screens. older children were found to spend several hours per day looking at screens as well. no matter their age, though, all children should have less screen time.

Explanation:

The first two sentences present factual findings from scientists about children's screen time. The third sentence "No matter their age, though, all children should have less screen time" expresses a judgment or recommendation (an opinion) about what children should do regarding screen time, unlike the previous factual statements.

Answer:

No matter their age, though, all children should have less screen time.