I think the answer is option 3. Can you please advise if I am correct? Thanks!

We need to describe how to transform the graph of f into the graph of g.
We have:
[tex]\begin{gathered} f(x)=x^4 \\ \\ g(x)=-(-x)^4 \end{gathered}[/tex]Notice that:
[tex](-x)^4=x^4[/tex]Then, we have:
[tex]g(x)=-x^4=-f(x)[/tex]Now, when we change the sign of the whole expression for a function this is equivalent to reflecting the graph of the function across the x-axis:
Answer: