[Q]: What is the missing first step of the following process: - The animal finds or builds a suitable place to hibernate where they can stay warm and protected - The animal moves into their den - Their heart rate and breathing slow down to conserve energy - They emerge from the den when the weather is warming up again.
****
[A]: An animal eats a lot of food to fatten up

[Q]: What is the missing first step of the following process: - People burn coal for heat or electricity - Pollution from the coal goes into the sky - Coal pollution enters clouds - Clouds rain over an area - The polluted rain becomes acid rain.
****
[A]: People dig up coal from the ground

[Q]: What is the missing first step of the following process: - Through warming or other methods a chunk is taken off the glacier - The chunk drifts into the sea - And it settles where it can remain in its state - It is considered an iceberg.
****
[A]: You start with a glacier

[Q]: What is the missing first step of the following process: - This mass creates high core temperatures - The mass decreases - The red giant can no longer fuse the carbon and oxygen in its center - The gravity of the star can no longer hold the outside layers - The layers break away - Only the inner core remains - This inner core is known as a white dwarf.
****
[A]:
A red giant burns mass