The word that best describes Ralph is "sensitive" and this can be confirmed by the sentence "We must make a fire."
One of Ralph's first ideas is to build a fire. This shows how sensible and rational he is, as the fire would serve as a signal for ships that passed on the island and could rescue them.
This question is about the book "The Lord of the Flies" and you can have more information about it at the link:
https://brainly.com/question/2741246