input question: What is the missing first step of the following process:  -  Steam is produced under pressure - Flows into a turbine - The turbine spins - Creates electricity.???
output answer: Coal is burned in a boiler

What is the missing first step of the following process:  -  Your tongue helps out, pushing the food around while you chew with your teeth - The esophagus moves food from the back of your throat to your stomach - Strong muscles in the walls of the stomach and gastric juices break down food in your stomach - Your stomach moves the food into the intestines to complete digestion -
----
Answer: The saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow

Q: What is the missing first step of the following process:  -  The parent(s) incubate the eggs - The eggs hatch - The mother (and sometimes the father) bird take care of the baby birds - The baby birds grow up and get their flight feathers - The young birds learn to fly and leave the nest - The adult birds find mates and mate.
A: A bird lays eggs in a nest

Question: What is the missing first step of the following process:  -  Water seeps into the remains - Minerals dissolved in the water form crystals - Crystalized minerals cause the remains to harden - The minerals form a fossil.
Answer: An organism dies

[Q]: What is the missing first step of the following process:  -  Your tongue helps out, pushing the food around while you chew with your teeth - The esophagus moves food from the back of your throat to your stomach - Strong muscles in the walls of the stomach and gastric juices break down food in your stomach - Your stomach moves the food into the intestines to complete digestion -
****
[A]: The saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow

Problem: Given the question: What is the missing first step of the following process:  -  An area of low pressure causes rotation - Several thunderstorms come together around this area - The storm is fed by rising air from warm ocean water evaporating - When the wind speeds reach 74 mph the storm is considered a hurricane.
++++++++++++++++++++++++++++++++
The answer is:

Thunderstorms form over the ocean