Biodiversity is the planet's full range of life forms. Humans are only one species among millions. Biodiversity benefiting humans and other species alike.
Experts discuss that biodiversity is required with issues surrounding food, medicines, industrial products, gene pool preservation, and biological services - such as pollination and cleaning water. We also have an ethical responsibility of stewardship over other species on the planet.
Students could discuss disadvantages to humans if biodiversity is reduced. They could explore the classroom, and research how much of what they see originates from a plant of animal. They could create a spider diagram that explains some of the ways in which a wide range of plants and animals are useful to us, in the manufacture of everything from medicines to furniture to clothing and more.
An interesting class discussion could be about whether biodiversity is beneficial for its opwn sake aside from the advantages to humans.