Final answer:
The research on disappearing frogs falls into the field of conservation biology, which focuses on studying the factors that threaten the survival of species and their habitats, and developing strategies to protect and preserve biodiversity.
Step-by-step explanation:
The research on why frogs are disappearing in the wild falls into the field of conservation biology.
Conservation biologists study the factors that threaten the survival of species and their habitats, and work towards protecting and preserving biodiversity.
They investigate the impacts of human activities, environmental changes, and other factors on the populations of organisms, such as frogs, and develop strategies to mitigate these threats.