The answer is Hypothesis. It is something more than just a wild guess but less than a well-established theory, a theory which can be tested through study and experimentation.. They are assumptions generally believed to be true. They are provisionally accepted in order to interpret certain events or phenomena, and to provide guides for further study.
Option 2 is correct because most of the components used in laptop is far different from Desktops. They are not able to fix in desktops. They are designed specially for laptops.
