input question: What is the missing first step of the following process: - Air is transported to the lungs - Air reaches the alveoli, the smallest air sacs in the lungs - In the alveoli, air passes into the blood within small capillaries - The gaseous oxygen in the air dissolves into the capillary blood - The dissolved oxygen is picked-up by red blood cells - The red blood cells bind the oxygen via a protein called heme - Red blood cells circulate throughout the body and reach the various tissues - Within small capillaries, the heme release the oxygen - The oxygen can then reach the cells within the tissue -???
output answer: The human body takes a breath inward

input question: What is the missing first step of the following process: - Melted rock inside the Earth is also called molten rock, or magma - Magma moves up through Earth's crust, but it does not always reach the surface - When magma erupts onto Earth's surface, it is known as lava - As lava flows from volcanoes it starts to cool - Minerals form when magma and lava cool -???
output answer: There are places inside Earth where rock will melt

input question: What is the missing first step of the following process: - Water is absorbed through roots - Chloroplast cells in leaves contain chlorophyll - Chlorophyll absorbs energy from sunlight - Energy splits water molecules into hydrogen and oxygen - Oxygen gets released into atmosphere - Hydrogen and carbon dioxide used to create glucose - Glucose is food for plants.???
output answer: Carbon dioxide passes through stomata in the leaves

input question: What is the missing first step of the following process: - Ocean water pulls sand off of beaches - Ocean water breaks rocks off of cliffs - Ocean water carries sand and rocks into the ocean - Sand and rocks go to other land or the bottom of the ocean.???
output answer:
Ocean waves hit land