What are some of the changes that have occurred in the past 50 years that have led us to now take 80 to 90 million metric tons out of the sea every year

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.