Question

words are birds by francisco x. alarcon
for them
there are
no borders
only stars
(20) moon and sun
limitless
plentiful
powerful
thoughtful

Explanation:

The sentence is "for them there are no borders only stars (20) moon and sun". We need an adjective to describe the space with stars, moon, and sun. "Limitless" fits as it means without limits, matching the idea of no borders. "Plentiful" refers to quantity, "powerful" to strength, and "thoughtful" to thinking, so "limitless" is the best choice.

Answer:

limitless