The second picture showing big rocks with the gaps between where they touched empty.
Explanation:
The figure shown in picture 2 will be the most porous as it does not comprise of any blocking particles. I t will be well sorted and will allow small molecules to easily pour through it.
On the other hand, the other figures like figure 3 will not have much porosity as the path is blocked by many large and small rocks in the image. Hence, it is not the correct option.
Since the child 4 years old WIC milk is better, it is highly nutritious, though cow milk may not has side effect on the child because at that age cholesterol cannot affect the child but help in brain development
