Question

A sequence is:

an arrangement of quantities whose positions are based upon the natural numbers

any list of numbers

a summation of quantities whose positions are based upon the natural numbers

Answer 1

It'd be your first option, An arrangement of quantities whose positions are based upon the natural numbers, I know cause I had the same question and this was the answer.

Explanation:

Answer 2

Because natural numbers are 1, 2, 3, 4, 5, etc. and a sequence can go in any order, the answer is any list of numbers