Which island is known for its diverse ecosystems and landscapes, sometimes referred to as the 'Garden Isle'?

Kaua'i is often referred to as the "Garden Isle" due to its lush, diverse ecosystems and stunning landscapes. The island is home to a rich variety of plant life, including tropical rainforests, waterfalls, and breathtaking beaches. Its geological features, such as the dramatic cliffs of the Na Pali Coast and the expansive Waimea Canyon, further showcase the island's natural beauty.

Rainfall is abundant on Kaua'i, contributing to its vibrant flora and the nickname "Garden Isle." This nickname also highlights the island's status as one of the most scenic and botanically rich in Hawaii. The rich ecosystems found in Kaua'i support a variety of wildlife, making it a popular destination for nature lovers and eco-tourists. The island’s commitment to preservation, with numerous state parks and natural reserves, ensures that these diverse landscapes are protected for future generations to enjoy.

In contrast, while other islands like O'ahu, Maui, and Ni'ihau each possess their own unique attributes and natural beauty, they do not embody the same level of verdant ecosystems and botanical diversity that Kaua'i is renowned for. Thus, Kaua'i stands out as the clear choice for this description.