One example is planting a tree
Here are some others
-recycling
-helping our environment in many other ways
Was this a question about stewardship relating to biology or just stewardship in general?
They make the structure and function of the cell
Fe2O3 + 6HCl -> 2FeCl3 + 3 H2O
If you count the number of each elements on both sides, they are equal. If you need me to explain this better, let me know and I would be glad to help