Consumers within market segments should be more similar to one another on key consumption-related characteristics than they should be with consumers in other segments. This requirement for effectively segmenting markets is referred to as:

Demographic Segmentation

Explanation:

Consumers within market segments should be more similar to one another on key consumption-related characteristics than they should be with consumers in other segments.

This implies that they must be of the same demographics

Demographics enable marketers to identify business opportunities in the form of  people's age group, level of income and income distribution, and overall populations of various regions.

Secondly, most consumption behaviors, attitudes are related directly to demographics.

That includes

i. Product needs often vary with consumers’ age.  Teenagers and young adults like perfumes and new mobile phones

ii. Age is a key factor in marketing many products and services.

iii. Age influences buying priorities. Teenagers and young adults prefer owning a car than a house

b.

c.

d.

g.

those r all of them i believe