Option 1: Hyperbole -> The phrase uses exaggeration with "endless worlds" and "thousand children" to create emphasis and evoke vastness.
Option 2: Personification -> No non-human entities are given human qualities in this line.
Option 3: Metaphor -> While "seashore of endless worlds" has metaphorical elements, it's not the primary figure of speech here.
Option 4: Pun -> There is no wordplay or double meaning intended in this line.
Hence, Hyperbole -> The line deliberately exaggerates with "endless worlds" (infinite/limitless) and "thousand children" (emphasizing a vast number) to create a poetic sense of boundlessness and infinite possibility, which is the defining characteristic of hyperbole as a figure of speech -> correct