How are natural numbers, whole numbers, integers, and rational numbers related

Each can be a classification within another group of numbers.

For example:
All whole numbers can be natural numbers (but not the other way around)
All natural numbers and all whole numbers can be integers (also not the other way around)
All natural numbers, whole number and integers can be rational (not the other way around :):):)):))

Natural numbers: 1, 2, 3, 4...

Whole numbers: 0, 1, 2, 3...

Integers: -2, -1, 0, 1, 2...

Rational number: -2.5, -1.72, 0, 1, 3.77... (any number that can be written down)

2is the answer trust me

B, it is easy to scan for key information. there are times when a lot of information is included in a business letter. the block letter format you find key bits of information quickly, without having to read through the whole paper.