Which of the following are true concerning living things? check all that apply.
they contain a vital force absent in nonliving things.
they are composed of molecules that contain carbon-carbon bonds.
they undergo chemical reactions to use energy they acquire from the environment.
they do not require catalysts to sustain their living state.

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.