Rephrased sentences:
1. The jungle is very thick, so almost no sunlight reaches the forest floor.
2. Orchids grow on tree trunks to get higher and catch more sunshine.
Short step-by-step explanation for a 6-year-old:
- The trees and leaves are packed together, so they block most of the sunlight.
- Because it is darker on the ground, orchids climb up tree trunks to find more light and stay happy.