Ayud, alguien me puede decir que son las ciencias sociales? ?

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil

Karen is a forensic scientist whose purpose is to identify and evaluate physical evidence. which of the following tasks does she perform? a. reporting results of scientific analysis b. interviewing suspects c. questioning witnesses d. preparing victims for burial