Answer: Option 'D' is correct.
Step-by-step explanation:
Since we have given that
Number of grams the adult lizard weighed at birth be 'w'.
According to question, Adult lizards weigh an average of 5.2 times what they weight at birth.
As for 'times ' we will use multiplication operation :
So, it becomes
[tex]\text{w=5.2 times b}\\\\w=5.2\times b[/tex]
Hence, Option 'D' is correct.