$\"\"$

Situation:

Choosing $\"\"$ different pizza toppings from a list $\"\"$ .

Conclusion:

Total number of pizzas from a list is $\"\"$ ,then $\"\"$ .

From the list choosing $\"\"$ different pizzas, So $\"\"$ .

Combination:

A selection of objects in which order is not important is called a combination.

Therefore, the situation is combination because the order of the toppings put on the pizza does not matter.

$\"\"$

Combination.