Answer:
Option C, How many planets there are
Step-by-step explanation:
The model of solar system presented here is a static model which means it can only display the static characteristics. Therefore, this model only presents the number of planets in the solar system.
In this model, weight of earth and size of the solar system can be resented through relative scale of weight such a one gram of weight representing 100000 Kg or 1cm representing 1 light year of distance but since no specific detail is given regarding any relative scale , thus option A and D are not the correct choice of answer
Option B is also not a correct choice of answer as speed is a dynamic characteristics and it cannot be represented in a static model.