OPTIONS: [I] UV rays. [II] Snow. [III] salt and water.. [IV] Heat energy. [V] air cools. [VI] kinetic energy. [VII] Subzero temperatures. [VIII] Water expanding.

Fact 1: Melting means changing from a solid into a liquid by adding heat energy. Fact 2: Ice Sculptures melt away. Given the two facts above, what causes ice sculptures to turn to liquid? ?
Answer:
[IV]