This text was written by a biologist as an answer to a student's question. Which question was it?

While frogs and toads are both amphibians, they are separate families of animals. And while they are similar in many ways, they do have differences, although they are not always clear cut. For example, frogs typically have long, strong hind legs that aid them in leaping, while toads have shorter hind legs more suitable for walking than hopping. Another difference in their appearance is their eyes. Frogs usually have big, bulging eyes, while toads' eyes are more subtle in appearance...

• What's the difference between toads and frogs?
• Where do frogs and toads live?
• What does a toad look like?
• What is the largest species of frogs?