What is the term for New Zealand's unique biota and ecosystems?

The term for New Zealand's unique biota and ecosystems is "flora and fauna." This refers to the variety of plant species (flora) and animal species (fauna) that are distinct to New Zealand, many of which are not found anywhere else in the world. New Zealand has evolved in isolation, leading to a remarkable array of endemic species, such as the kiwi bird and the silver fern, which have become symbols of the country's natural identity. Understanding flora and fauna is crucial for appreciating New Zealand's ecological diversity and the importance of conservation efforts to protect its unique environment.

The other options, while related to natural attributes, do not specifically capture the unique biodiversity of New Zealand. "Climate diversity" pertains more to the various climates influencing ecosystems rather than the species themselves. "Ecological heritage" suggests a broader concept that encompasses history and cultural relationships with the land, while "natural landscape" describes the physical terrain and geography but doesn't specifically highlight the biological aspect. Thus, "flora and fauna" is the precise term used to articulate the unique biological elements of New Zealand's ecosystems.