Reading Comprehension — quick quiz

Passage: The coconut tree is called the 'Kalpavriksha' or wish-fulfilling tree in Kerala because every part of it is useful. The fruit provides nutritious water and meat. The husk is used to make coir, which is exported worldwide. Coconut oil is extracted for cooking and cosmetic purposes. The leaves are woven into mats and baskets, while the trunk is used for construction. Kerala is one of the largest producers of coconut in India. Question: According to the passage, why is the coconut tree called 'Kalpavriksha'?