By what age are children purposefully using smiling to communicate positive emotions? 6 months 1 year 18 months 2 years

6 months

Explanation:

6 months old babies do not have the ability to decide if something is funny or not. However, they do have the ability to smile when they want to show positive emotions. For example, they can make a lovely smile when they look at their mothers or when they are pleased about something. Babies communicate positive emotions with their smiles even before they can walk or speak.

c-flooding of the area and the development of wetlands.

tell me if im wrong.

answer; ///i believe that the correct answer is because the house and senate frequently pass different versions of the same bill;