The document compares the adaptations of cacti and water lilies, then grass and Venus flytraps. Cacti collect water through spines and store it in their stems, while water lilies get water from surrounding water and do not need roots. Cacti absorb sunlight through their large stems and grass through leaves, while water lilies and Venus flytraps absorb sunlight through their leaves. Cacti get food from soil through roots, water lilies get nutrients from water and sunlight, grass takes in food from soil, and Venus flytraps get food from trapping insects.