a seed / a pit or stone in a fruit / a gamete (reproductive cell such as a spermatozoan or egg) / a lineage, bloodline / an origin, cause / the materials or ingredients from which something is made

dying out

to die out

on the verge of / on the brink of

crisis, pinch

(literary, rare) by the ocean

seed / plant, sow / class, kind, variety / (taxonomy) species

a seed / a kind, type, sort, class, or category / (taxonomy) a species

counter for number of kinds or types

an origin, cause / a type, class / an interest, appeal