input: Please answer the following: What is the missing first step of the following process: - The filter has small pores to catch pollutants - The filter will catch chlorine, heavy metals, and other chemicals - The filter allows water and mineral ions like fluoride to pass through - The water on the other side of the filter is much cleaner -
++++++++++
output: Water comes through a filter

Please answer this: What is the missing first step of the following process: - Composition of blood is regulated - Volume of water in blood is kept constant - PH is kept at a constant level - Kidneys help regulate blood pressure - Kidneys stimulate the making of red blood cells - Calcium levels are maintained.
++++++++
Answer: Kidneys filter waste out of blood

Problem: What is the missing first step of the following process: - Green house gases enter from the earth - Heat is trapped in atmosphere - Different things on earth are hotter - The overall planet is hotter.

A: Suns heat enters atmosphere

Problem: Given the question: What is the missing first step of the following process: - As the plates move, they exert a great force - When the force is large enough, the crust breaks - The stress is released as energy - The energy moves through the Earth in the form of waves - We feel the earthquake -
++++++++++++++++++++++++++++++++
The answer is:
Plates on the Earth's crust move slowly past each other

input question: What is the missing first step of the following process: - They secrete digestive juice 'externally' into the small intestine - There are enzymes for breaking down fats, proteins , and carbohydrates - Digestive juices flows from the pancreas through an excretory duct into the small intestine - When the blood sugar levels rise, as they might after a meal, insulin is released - When blood sugar levels are too low, the pancreas releases glucagon into the bloodstream -???
output answer: Over 99% of the exocrine pancreas cells produce digestive juices

input question: What is the missing first step of the following process: - The matter forms on the sea floor - Layers of sediment form above the matter compressing it - After many years the matter is compressed and heated - The result is that crude oil forms.???
output answer:
Living organisms in the sea die