Tropical rainforests have a climate with no dry season, with rainfall heavy and frequent throughout the year. The habitat supports a variety of plants and animals, with factors like soil, temperature, light, food and predators influencing what can live there. The rainforest is home to over half the world's animal species across its four layers, from tiny insects to large mammals. Non-living elements like soil, rocks, water and sunlight also make up the rainforest environment.