Insects are a diverse group of animals that belong to the class Insecta. They have three main body parts: the head, thorax, and abdomen. Common examples include ants, bees, and butterflies. Insects can be found in nearly every environment on Earth, from forests to deserts. Many insects play important roles in ecosystems. For instance, bees are crucial for pollination, helping plants reproduce. Ants contribute to soil health by aerating it and breaking down organic matter. Additionally, some insects, like ladybugs, help control pest populations, making them beneficial for gardens and agriculture.