Answer:
c: thermal expansion
Step-by-step explanation:
to be quiet honest bet someone else already answer sorry for being a bit late but its because the thermal energy exspands technically fabric but what is inside to kinda protect the fabric from going (boom caught in flames) but think about it heat expanding the object wow like how heavy ice expands the sidewalks to make the crack or when its winter and the ice cold air expands metals that objects that would never float in mid air that object that just heavily expand flames bring off air and all that briliant stuff but lets be honest imagine how fast the atoms molocules got during the time you are just relaxing in the sky the presure but yes a bit much wording but if you understand the concept you know the game by heart thats what i say (grammer is off minor apologies)