Step 1: Recall from passage.
The passage mentions that immature coconuts are harvested for their liquid endosperm (coconut water) called Shahale.
Step 2: Eliminate incorrect options.
- Coprale → Incorrect spelling, not used.
- Mahale, Kahale → Not relevant terms.
Step 3: Conclusion.
The correct name is Shahale.
Final Answer: \[ \boxed{\text{Immature coconut water is called Shahale.}} \]