Final answer:
The question appears to involve concepts of density and specific heat in Physics; however, it seems to be incomplete and lacks sufficient context to provide a definitive answer. Therefore, the correct answer is b) 50%.
Step-by-step explanation:
The question seems to be centered around the concept of density and its influence in a physical scenario, potentially involving the melting of ice and how this affects water levels or the properties of other materials.
Specifically, the statements discuss the impact of density changes in various contexts, such as ice cream above and below the rim of a cone, the impact of temperature on air density, and the specific heat capacity of substances like ice.
The spirit of the question likely involves understanding the principles of density and specific heat, and applying that knowledge to determine how it affects the scenarios described, such as the density of the ice cream or the volleyball when subjected to different conditions.
An accurate response would require applying the given pieces of information to those principles but, unfortunately, the actual question seems to be incomplete and lacks sufficient detail or context for a definitive answer.