11+ Q

[nrk]

My son is stuck on this question on his 11+ practice question paper. I feel like it's a very obvious answer but my brain can't make sense of it either.

 

[solo_guitar]

My son is stuck on this question on his 11+ practice question paper. I feel like it's a very obvious answer but my brain can't make sense of it either.

Which part of the question is your son stuck on? Part a? Part b? Part c?