A local optimal solution: a. Is identical to the global optimal solution. b. May exist even if a global optimum solution does not exist. c. Is better than any other feasible solution in its immediate, or local, vicinity of the current solution. d. May exist even if the problem is infeasible.

Hii1977 cleaner shrimp are a species of shrimp that clean parasites from other organisms. fish allow the shrimp to eat the parasites in their mouth. the shrimp get a source of nutrition. the relationship between the shrimp and the fish is this association indicates that for the smaill aneser arecommensal,mutualistic,or parasitic for the begger one the anser are the shrimp and fish benefit each other , the shrimp harm the fish, or the fish do not benetit from the shrimp