Answer
A ∪∅ = {a,g,h}
Work Step by Step
U = {a,b,c,d,e,f,g,h}
A = {a,g,h}
The set A ∪∅ represents all the elements of A and the elements of ∅ which are not in A.
As we know ∅ represents empty set.
The elements of A ∪∅ are a,g,h.
A ∪∅ = {a,g,h}