How can you differentiate between male and female frogs?

The differentiation between male and female frogs can often be observed through physical characteristics and behavioral traits. Males typically possess a more pronounced vocal sac, which they use during mating calls to attract females. This adaptation is crucial for their reproductive success, especially in species where males compete for the attention of females through sound.

Additionally, males are generally smaller in size compared to females. This size difference is common in many amphibian species, as it allows females to carry and lay eggs while being larger, providing them with better reproductive capabilities. The combination of a more prominent vocal sac and smaller body size makes it easier to identify male frogs.

Given this understanding, the correct choice accurately highlights these defining characteristics, which are essential for distinguishing between the sexes in frogs.