CONCEPTS: forest, shadow, trunk

GEN: shadows move over tree trunks in a forest

CONCEPTS: effect, prevail, tree

GEN: effect of prevailing winds on an avenue of ornamental trees in parkland

CONCEPTS: brow, furrow, turn

GEN: Someone turns to the window with his brow furrowed.

CONCEPTS: flow, forest, stone, stream

GEN:
stepping stones create a bridge across a small stream flowing through the forest