Final answer:
Places with high biological diversity include rainforests and coral reefs. Madagascar’s tropical lowland rainforest and the world's coral reefs are examples of biodiversity hotspots, harboring many species and facing threats from human activities.
Step-by-step explanation:
Some places with high biological diversity include rainforests, coral reefs, savannahs, and mountains. Rainforests, such as the tropical lowland rainforest in Madagascar, support an extensive variety of species due to their favorable climate and abundant resources. Madagascar's rainforests, found on the windward side of the island, are examples of high biodiversity areas estimated to house about five percent of the world's animal and plant species. Coral reefs are another ecosystem with incredibly high biodiversity. They are often referred to as underwater rainforests because of the vast number of species they support. Unfortunately, many biodiverse ecosystems, including rainforests and coral reefs, are threatened by human activities such as logging, deforestation, and pollution.