Question: What is the missing first step of the following process: - The roots of the growing plants start to break up the rock - The plant acids dissolve the rock - The rock is broken down into smaller pieces - Erosion begins.
Answer: Plants start growing on or near the rocks

Question: What is the missing first step of the following process: - Bloodstream - Cells in the body are attacked - Cells are killed - Different kinds of sickness are formed.
Answer: Bacteria enters the body

Question: What is the missing first step of the following process: - Air goes through all the little branches in your lungs to fill up the air sacs, or alveoli - Oxygen goes through the walls of the alveoli and into the capillaries - The oxygen goes into the bloodstream - Oxygen is left and carbon dioxide is picked up - You breathe it out through your lungs -
Answer:
You breathe in