While some segmentation methods rely on external descriptions and factors to break down the market, segmentation relies on consumers' descriptions of themselves.

psychographic segmentation

Explanation:

Psychographic segmentation in marketing has to do with market division into segments based on consumer's different characteristics of human behaviour. It is one of the methods of segmentation other than demographic, behavioural, and geographic segmentation. Psychographic segmentation divides market focused consumers based upon different personality traits, values, attitudes, interests, and lifestyles of consumers.

the correct answer is d