Answer:
A
Explanation:
velocity is a vector quantity, it has single direction.
B and C are speed while D is acceleration
Please recheck, for this may not be the correct answer
Can you explain so I can answer? (In comments)
A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B. Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.