Answer:
Arctic ocean Mediterranean forest
Indonesian rain forest
Explanation:
Out of the given three, the Arctic Ocean ecosystem hosts the least biodiversity because this ecosystem is the toughest for majority life forms to survive in. Characterized by continued winter all throughout the year, this ecosystem stands the harshest of all. The Mediterranean climate is characterized by hot and dry summers and cold and wet winters. The number of species of plants, animals, birds and other organisms that can survive in both these two contrasting conditions is considerably low. The Indonesian Rainforest favours the survival and growth of a huge number of species allowing it to be biologically the most diverse out of the given three.