Question

which ecosystems are the most biodiverse? select two correct answers a coral reef b deciduous forest c grassland d rainforest

Explanation:

Coral reefs are often called the "rainforests of the sea" due to their high biodiversity. They support a vast number of species. Rainforests on land also have an extremely high level of biodiversity with a large variety of plants, animals, insects, etc. Deciduous forests and grasslands have significant biodiversity but not as high as coral reefs and rainforests.

Answer:

A. Coral Reef, D. Rainforest