Sadly, Mary experiences a smaller than normal head, heart defects, intellectual disorder, learning difficulties, and delayed growth. If these defects can be traced to a teratogen used by her mother during pregnancy, which was she most likely abusing?

alcohol

Explanation:

Teratogens are substances or agents associated with malformation of embryo, that can contribute to birth defects such as smaller head than normal, heart defects, intellectual disorder, learning difficulties, and delayed growth. This substances or agent or factors includes the following; some maternal diseases, pollutants, drugs and alcohol.

Hence, it can be concluded that Mary's mother abused alcohol during the time she was carrying Mary's pregnancy

this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.