[Q]: - Begin the party - Partake in activities - Bring out the cake - Sing 'Happy Birthday!' - Blow out the candles - Eat the cake What might be the last step of the process?
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[A]: Open the presents

[Q]: - People separate different materials to be recycled - The recyclable materials go to a recycling center - The recycling center further separates the materials - Large equipment compacts the materials into bales - The recyclable materials are shipped to other recycling centers - The other recycling centers further process the materials that center specializes in - The materials are purchased by manufacturers - The manufacturers process the recycled materials the same way they would use new materials What might be the last step of the process?
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[A]: The recycled materials are incorporated into new products.

[Q]: - A plant dies - The remains of the plant are buried very fast in sediment - The soft parts of the plant decay - The hard parts of the plant are replaced with minerals - The sediment turns into rock - The rock erodes What might be the last step of the process?
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[A]: The fossil appears on the surface of the ground.

[Q]: - Air enters the lungs through bronchial tubes - Air enters bronchioles - Bronchioles have tiny air sacs called alveoli - Alveoli surrounded by small blood vessels - Oxygen absorbed by small blood vessels - Vessels deliver oxygen to every cell in the body - Blood brings carbon dioxide back to lungs What might be the last step of the process?
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[A]:
Carbon dioxide released when you exhale.