The three types of biodiversity are genetic, species, and ecosystem diversity. They all play a big part in biodiversity and this is what they mean:

 

Genetic Diversity: Genetic diversity is the difference of genetic characters in a speciment, or a whole ecosystem. It refers to DNA/RNA that is passed from parents to offspring. An example would be the diversity in a colony of bees.

 

Species Diversity: The difference of species in an ecosystem. This includes species richness and the balance of species (food chains, overpopulation). An example would be the diversity beteewn a colony of ants, and a colony of bees. 

 

Ecosystem Diversity: The difference and abundance of ecosytems in the world. It also refers to the different ecosystems in different biomes/physical habitats. An example would be the diversity beteewn a hive and an ant burrow (tundra, savannah, desert, etc.)