input question: What is the missing first step of the following process: - The liver produces bile - The liver produces proteins for blood plasma - The liver converts excess glucose into glycogen for storage - The liver converts ammonia to urea - The liver regulates blood clotting.???
output answer: The liver filters blood from the digestive tract

input question: What is the missing first step of the following process: - These plants die - The soil gains organic material - The soil becomes more fertile - Larger plants are able to be supported - Trees eventually grow.???
output answer: Grass and small plants grow in an area

input question: What is the missing first step of the following process: - Over long periods of time rain can hit the limestone - And cause a acidic reaction - The limestone will slowly disintegrate - A large gap with be where the limestone was - Result in the cave.???
output answer: Some of the rock in the ground is made of limestone

input question: What is the missing first step of the following process: - The sweat changes into a gas - Heat is drawn from the sweat - This process draws heat from the body - The evaporation also cools the remaining sweat on the body.???
output answer:
As the sweat evaporates the sweat sheds molecules into the air