Answer:
It was called MANURE
Explanation:
Its a type of fertilizer which plant are ploughed back into the soil.
GOOD LUCK
Answer: decomposition
Explanation:
1 . Combustion is a type of chemical reaction in which a hydrocarbon reacts with oxygen to form carbon dioxide ans water along with liberation of large amount of energy.
2. Decomposition is a type of chemical reaction in which a single reactant gives two or more than two products.

3. Single replacement is a type of chemical reaction in which a more reactive element displaces the less reactive element from its slat solution.
4. Synthesis is a type of chemical reaction in which two or more than two reactants combine together to give a single product.
Answer:
Barium Di-chloride (BaCl^2). H^2 is released as a by-product in the form of a gas.
Explanation:
Plants don't need sap. They make it like Maple trees.