Second to petroleum and natural gas, the most profitable resource ...

[sam.t96]

Second to petroleum and natural gas, the most profitable resource recovered from the marine environment is:
 a. diamonds.
 b. sand and gravel.
 c. coal.
 d. gold.

Question 2

The most important physical factor affecting rocky intertidal communities is ________.
 a. variations in salinity
 b. the rise and fall of the tides
 c. variations in temperature
 d. wave shock

[Carliemb17]

Answer to Question 1

b

Answer to Question 2

b

[sam.t96]

Wow, this really help

[mcabuhat]

Thanks for the timely response, appreciate it