<u><em>Answer:</em></u>
Change the texture of their scales
<u><em>Explanation:</em></u>
Species with this characteristic are capable of changing the texture to fool predators, not attract mates
Answer: By display of Discriminative stimulus
Explanation:
Discriminative stimulus is the stimulus that is responsible for being present in the environment where behavior is reinforced.This behavior is learned by the help of discriminative stimulus acting as a cue .It can be used in the field concerned with animals such as lab test in which they are trained to perform something whenever they sense or see cue.
According to the question, Bill is using the strategy of discriminative stimulus in the form of alarm. Whenever the alarm rings in the form of discriminative cue he knows that its a signal or reminder for drinking water.
I would say that the main purpose of the European Union is to strengthen the economy of the member states by merging their economies and by introducing one stronger, common economy - a stronger economy for the states means a better comfort of life in those states.
