answer: (C)
The property of water that makes climate in Europe mild is its high (C) specific heat capacity.
Water has a high specific heat capacity, which means it can absorb and store a large amount of heat energy without a significant increase in temperature. This property allows water to act as a temperature buffer, moderating the climate in nearby areas. In Europe, the presence of large bodies of water, such as the Atlantic Ocean and the Mediterranean Sea, helps to regulate the temperature of the surrounding land areas, keeping them relatively mild. This is why many areas of Europe have a temperate climate, with mild winters and cool summers.
Adhesion and capillary action refer to other properties of water that are important in different contexts, while ice being less dense than water allows it to float, which has important ecological implications, but it is not directly related to the mild climate in Europe.