Step 1: Understanding the Concept:
Biodiversity (biological diversity) is the measure of variation at the genetic, species, and ecosystem levels.
Step 2: Key Formula or Approach:
It encompasses the entire complexity of life, not just a single group like plants or animals.
Step 3: Detailed Explanation:
Biodiversity is categorized into three levels:
\begin{enumerate}
Genetic Diversity: Variation of genes within a species.
Species Diversity: Variety of species within a habitat or region.
Ecosystem Diversity: Variety of habitats, communities, and ecological processes.
\end{enumerate}
Step 4: Final Answer:
Biodiversity refers to the variety of life forms at genetic, species, and ecosystem levels.