Answer:
Region A
Step-by-step explanation:
The water has a very high specific heat, which means that it takes a lot of energy to heat the water. This property makes the water in the ocean not warm during the day with solar energy and remains cool and cold. The regions close to this water also become colder, however the temperature increases as the region is further away from the ocean. In the case shown in the question above, we can see that the warmest region during the day is region A, because it is farthest from the ocean.