Final answer:
The laptop components that can be replaced relatively easily are the RAM and the hard disk, which help in enhancing performance and storage capacity respectively. However, not all laptops have components that are easily replaced.
Step-by-step explanation:
In the context of laptop components that can be replaced relatively easily, the first part of the answer is the RAM (Random Access Memory) and the second part is the hard disk. These two components are designed to be user-replaceable in many laptop models. The RAM is usually accessible via a small panel on the underside of the laptop, while the hard disk can often be replaced by removing a few screws to access the drive bay. Replacing these components can help improve a laptop's performance or expand its storage capacity.
It is important to note that not all laptops have easily-replaceable components, as the trend towards thinner and lighter devices has led some manufacturers to solder components onto the motherboard, making them difficult or impossible to upgrade or replace.