D. Synthesis cause A + B --> AB
Equation: 2Na + Cl2 --> 2NaCl
Answer: CaC12
Explanation: Calcium chloride not 100% sure tho
The answer is D, because "Animals without a backbone are invertebrates."
<u><em>Answer: Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products.</em></u>
Explanation: