Provolone or monterey jack (not pepper jack) cheese can be sufficient substitutes for mozzarella.
goat cheese
That's up to you. They taste totally different.
There are many pizza recipes that use feta cheese. For example one could make a Greek pizza with spinach and feta cheese. As a topping feta cheese goes very well with olives.
feta
No not really.
No, it is totally different.
many people use fontina but it does have a milder taste
Yes, you can freeze feta cheese. However, freezing may change its texture and crumbliness. It is best to use frozen feta in cooked dishes rather than for salads or as a topping.
Velveeta is so different from feta cheese that I can't imaging any way or any recipe where they could be substitued for each other.
Yes, you can freeze crumbled feta cheese for later use. Just make sure to store it in an airtight container or freezer bag to maintain its freshness.
No, it is totally different
No, it hasn't the slightest resemblance to Parmesan