Creating lexicons by geometric progression focuses on which aspect?

Creating lexicons by geometric progression emphasizes the morphological structure of words. This approach highlights the relationship between base units of meaning, or morphemes, and how they can be combined or transformed to generate new words or forms. Morphological structure involves understanding how different prefixes, roots, and suffixes work together within a language to convey complex ideas, enrich vocabulary, and adapt language use across various contexts. This method is particularly effective in showcasing how language can expand systematically, allowing learners to comprehend and apply linguistic rules in a structured manner.

The other aspects mentioned in the choices—fluency in spoken language, syntactical accuracy, and pragmatic language use—do not primarily focus on the systematic building of vocabulary itself nor do they encapsulate the essence of geometric progression in lexicon development. Fluency pertains more to the ease of expression and efficiency in communication, syntactical accuracy involves the arrangement of words to create grammatically correct sentences, and pragmatic language use pertains to the context-driven, socially appropriate use of language in communication. While these aspects are essential in language learning, they are not the focal point when discussing lexicons created through geometric progression.