Which would best describe the process of natural selection

Which strategy is an example of how companies may upgrade themselves to meet changing customer preferences? a.doing door-to-door sellingb.using billboards to advertise the productsc. making online shopping services availabled.giving discounts on products

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist