Step-by-step explanation:

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Answer:

But what about this wall? Was this always here?” Ted asked. 1 replied, “No, this wall was not always here. During old times we along with our additive inverses and 0 used to live together. During that time, this world was big and was called the world of INTEGERS.”

EXPLANATION:-

According to the question, 1 replied that this was not always here. during old times, means before invention of zero, positive numbers, means which starts from 1, lives together with their additive inverses, means negative numbers.

If we look on to question briefly, it meant that, 0 is the wall between positive numbers and negative numbers.

SO, ted asked to "1" that "what about this wall?(means 0) was this always here?

So, "1" replied, in during old time(before invention of 0), we(positive numbers) lived together with our additive inverses(negative numbers).

SO, At last we can conclude that, "0" is the wall between positive and negative numbers, combination of positive and negative numbers is called INTEGERS.

AND HENCE THE ANSWER IS INTEGERS.

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