In the melting of ice, which one of the conditions will be more favourable?

A crystalline solid with an organised structure, ice is. Ice floats on water because it is less thick than water. Ice dissolves by an endothermic mechanism. As a result, more ice will melt into liquid water when heat is applied to it.

Understanding the structure of ice is necessary before we can answer this issue. A crystalline solid with an organised structure, ice is. Ice floats on water because it is less thick than water. This is owing to the water molecules' ability to form intermolecular hydrogen bonds with one another, which prevents them from being packed more tightly.
Let's now take a closer look at some of the gas laws that we'll be relying on to find the answer to this problem.

Boyle's law asserts that, as long as the temperature is constant, the volume of a given mass of a gas is inversely proportional to its pressure.
Ice melting is an endothermic process as well. As a result, more ice will melt into liquid water when heat is applied to it.
Given that ice has a larger volume than liquid water, melting ice is an endothermic process that also results in a change in volume. Because of this, ice melting is influenced by both temperature and pressure.

Both the solid phase and the liquid phase are in balance with one another at the melting point. The temperature at which the vapour pressure of the liquid phase and the solid phase are in balance is known as a solid's melting point (and equal). More solid will melt as the temperature rises, but the system's temperature will stay constant at the melting point until all of the solid has melted.

Since the temperature won't change while the ice melts, the relationship between volume and pressure will be inverse. The pressure will rise because ice melting results in a reduction in volume. Therefore, more ice will melt if we apply greater pressure.

Thus, the correct option is (A).