Green vegetation, which grows rapidly after rainfall, and serves as good food for many animals. The withering of grass in hot weather is often used in Scripture as a symbol of the frailty and brevity of human life.
Grass is food for animals
Rain is essential for the growth of grass
Grass grows quickly and abundantly
Grass withers, dies and burns easily
The life cycle of grass is short
The brevity of human life is compared to that of grass