Which ions should have the most exothermic δhhydration?

Domain eukarya; kingdom plantae should be the answer.

45 is the correct answer

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.

Dis the best answer im sure it is it has to be im positive