Answer:
To estimate the lizard population, you can use the ratio of marked lizards to the total number of lizards observed.
\[{Marked lizards ratio} = {Number of marked lizards}{Total number of lizards observed}}
\]
In this case:
{Marked lizards ratio} = {63}{420}
Now, apply this ratio to the initially marked lizards:
{Estimated lizard population} = {63}{420} \times 96
\]
Calculating this gives approximately {63}{420} \times 96 \approx 14.4 \).
So, to the nearest whole number, the best estimate for the lizard population is 14.