Pls help me with this one ASAP (I took a picture of the questions)

What is thought to have caused the mass extinction at the end of the cretaceous period?

At which location in earth’s interior does the top density continue to increase as thickness decreases?

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.