Which child has probably entered the stage of concrete operations? sobechi, who can follow the rules of a game sally, who knows the names of the kids in her class sato, who can count to 100 saada, who can draw a face well?

I believe the correct answer is Sobechi, who can follow the rules of a game.

Jean Piaget considered the stage of concrete operations, third stage of cognitive development, as a major turning point in the child's cognitive development. In this stage child learns think logically and understands the concept of hierarchy. Therefore, Sobechi, who can follow the rules of a game has entered the stage of concrete operation as he can now think logically and understands that there are rules and hierarchy.

b) trade is easy because of the direct line between their major ports. bilateral trade reached 89,6 thousand million.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.