Nuts have hard shells, while apple and raspberries are juicy. What are both adapted for?

The juicy fruits are adapted for distribution by animals that feed on their pulp and find them by smell and color.
Nuts are spread by water, birds and other animals, humans, self-spreading.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.