Match each ellipse in List I with the area it encloses in List II.

Explanation

1. 01

   A: $a = 3$, $b = 1$. B: dividing by 4, $x^{2} + \frac{y^{2}}{4} = 1$, so $a = 1$, $b = 2$.

2. 02

   C: $\frac{x^{2}}{36} + \frac{y^{2}}{9} = 1$, area $\pi \times 6 \times 3$. D: $\frac{x^{2}}{16} + \frac{y^{2}}{9} = 1$, area $\pi \times 4 \times 3$.