Answer: Sensory adaptation
Step-by-step explanation:
Sensory adaptation is defined as the function performed by the body in which the sensitivity tends to decrease in presence of stimulus after being exposed to it continuously. This makes adaption of the sensitivity towards the environment and other factors present in that surroundings.
According to the situation mentioned in question .Tyshane felt the water was cold at first but after sometime he felt that water is fine as his body was at constant exposure towards cold water and became adapted to the water(stimulus) and sensitivity got reduced.Thus, Sensory adaptation is depicted from the scenario.