HELP ! BIOLOGY! sorry my screen is hard to read but i need help with these two questions please !

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.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

What chemical speeds up the process of decomposition in dead organisms are exposed to it? nitrogen oxygen hydrogen chlorine