Answer: Beaker-3 with three spoon of salts is more concentrated.
Step-by-step explanation:


Higher the given mass of compound in a solution, higher will be the concentration of that solution and vice versa.
Here, the beaker-1 contains one scoop of salt , beaker-2 contains two scoops of salts and beaker-3 contains three scoops of salt with equal amount of water in all the three beakers. So, the increasing order of amount of salt:
1 scoop of salt < 2 scoops of salt < 3 scoops of salt
Since, the amount of salt in in beaker-3 is highest that is with three scoops of salts. The concentration is beaker three will be higher than beaker-2 and beaker-1.
Hence, the order of increasing concentration in all beakers will be:
Beaker-1<Beaker-2<Beaker-3