Answer is: <span>Double Displacement. Combustion is reaction with oxygen. </span>Synthesis is reaction of two or more substances combining to make a more complex
substance. Decomposition is reaction where one substance is broken down into two or more simpler substances. Single Displacement is reaction where neutral element metal or nonmetal
become an ion as it replaces another ion in a compound. <span>Double displacement
reactions (more reactive metals displace metals with lower reactivity). </span>Neutralization<span>is is </span>reaction<span> in which an </span>acid<span> and a </span>base<span> react quantitatively with each other.</span>