Which state of matter has strong attractive force, molecules are in fixed positions, molecules only slightly vibrate and contain the least amount of energy A. solid
B. liquid
C. gas
D. plasma

C: plants and animals

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

Use a magnet to separate iron, evaporate water, i'm not sure how to separate the other two i'm sorry but good luck