In order for natural selection to occur, there must be variation within the population. Which statements are an accurate reflection of the relationship between natural selection and variation in the population?

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

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

The process of replication is the same for all living things because