Which organisms are classified as plants?

Plants are classified as multicellular organisms that belong to the kingdom Plantae. This group includes a wide variety of organisms characterized by their ability to photosynthesize, which means they can produce their own food using sunlight, carbon dioxide, and water. Trees, shrubs, and flowers are all examples of vascular plants that exhibit this characteristic.

Trees are woody plants that provide structure and support; shrubs are smaller, bushy plants often found in gardens and landscapes; and flowers represent the reproductive structures of many plants, enabling them to reproduce and spread. All these examples fall clearly within the definition of what constitutes a plant, highlighting their role in ecosystems as producers that form the base of food chains.

In contrast, the other groups listed consist of organisms that do not fit within the Plantae kingdom. Algae are sometimes classified as protists or plants, but amoebas are different entirely as protists. Fungi are a separate kingdom altogether, focusing on decomposition rather than photosynthesis, and bacteria do not belong to the plant kingdom either. Lastly, insects and worms are classified as animals, which also distinguishes them from plant classification. Therefore, the only correct answer that exemplifies true plants is the group including trees, shrubs, and flowers.