Why is the burning of magnesium considered a chemical change

Hello!

Judging by the question you have provided I have come to the realization that the burning of any substance is a chemical change because different elements are mixing. For example, if paper is burnt the paper combines with oxygen to produce smoke and ash, this is a chemical reaction that can be observed as well. 

Moreover, the burning of magnesium will also produce a unique chemical reaction that can be observed. When magnesium is burned it produces a bright light with smoke and ash.

Hope this helped!
-Blake

The answer for this question is d. none of these

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na