Question 6
A coconut is built for a voyage by sea. What does the water inside it provide?
The right answer is the one marked above.
A supply of fresh water for the seedling — on a journey across salt sea, where there is none to be had.
Each of the other three is a real job, done by a different part: the fibrous husk provides the buoyancy, the hard shell keeps the salt water out, and the kernel is the food store. Every part of a coconut is doing something for the voyage.