The sudden response of the frog, such as jumping, indicates a reaction to an external stimulus.
How to explain
Frogs are known to exhibit reflex actions in response to various stimuli. In this scenario, the environmental stimulus that could cause the frog to jump might be tactile.
If the frog perceives a sudden touch or pressure on its skin or legs, it may elicit a reflexive reaction, causing it to jump. This reaction is part of the frog's defensive mechanism to escape potential threats or disturbances in its environment.
Therefore, the identified environmental stimulus triggering the frog's response could be tactile stimulation.
Complete Question:
In a high school biology experiment, a frog exhibits a sudden response by jumping when exposed to a specific external factor. Identify the environmental stimulus that the frog is perceiving.