Jungle:

“He climbed over a broken trunk and was out of the jungle”.

Mountain:

“A deep, harsh note boomed under the palms, spread through the intricacies of the forest and echoed back from the pink granite of the mountain. Clouds of birds rose from the treetops, and something squealed and ran in the undergrowth”.

Island:

“This is an island. At least I think it’s an island. That’s a reef out in the sea. Perhaps there aren’t any grownups anywhere.”

Trees:

“He picked his way up the scar, passed the great rock where Ralph had climbed on the first morning, then turned off to his right among the trees. He walked with an accustomed tread through the acres of fruit trees, where the least energetic could find an easy if unsatisfying meal”