Coral reefs are declining everywhere around the globe because ...

[formula1]

Coral reefs are declining everywhere around the globe because
  1.the oceans pH is changing too rapidly.
  2.tourist divers do not respect the dont touch practice.
  3.their symbiotic zooxanthellae are dying.
  4.ocean temperature is rising too rapidly.
 
Question 2

Extinct marine crustaceans like this fossil Trilobite provide evidence in support of
  1.the origin of life occurring in the ocean.
  2.speciation, or change over time.
  3.life existing on Europa.
  4.plate tectonics.
 

[bob]

Answer to Question 1

3

Answer to Question 2

2

[formula1]

Thanks for the timely response, appreciate it

[cassie_ragen]

Great answer, keep it coming