The correct answers that contribute to the uneven heating of the Earth are:
- The angle of incoming sunlight varies at different places.
- Land and water have different heat capacities.
These two factors are key in causing uneven heating across the Earth's surface. The angle of sunlight affects how much solar energy a particular area receives, while the different heat capacities of land and water influence how quickly and to what extent these surfaces heat up and cool down.
The other options listed do not directly contribute to the phenomenon of uneven heating.