Can someone please help me with math.

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Do you mind if you guys me with this question i’m on number 8

How do you write a paragraph proof to prove that the corresponding angles shown are congruent