Question

sort the words according to the meanings of their shared roots.
full or fill
kind or origin
genesis
gene
plentiful
plenty
generation
genetic

Explanation:

For the "full or fill" category, words related to abundance or fullness are "plenty" and "plentiful" as they convey the idea of being full or having a lot. For the "kind or origin" category, words related to origin or kind (genetic, generational, etc.) are "gene", "genesis", "generation", "genetic" as they relate to origin (genesis - beginning/origin, gene - basic unit of heredity/origin of traits, generation - a group in a lineage, genetic - related to genes/origins of traits).

Answer:

• "full or fill" group: plenty, plentiful
• "kind or origin" group: gene, genesis, generation, genetic