It would be sonar i think
The last place you left it! :)
Answer:
GPS Is The Answer!!!!!!!!!
I find that the best answer is the following one:
c. determined by factors outside our control
For example, even though life is very hard in the very hot and the very cold regions, we can't control it: so this is an example of a physical environment that is hard to control.
In comparison, it is often easier to describe than our social environment.
The correct answer is B. Sunlight is a limited resource in the lower
depths of the oceans. A is not correct, as there is plenty of water
throughout the entire ocean. C and D are not correct because many plants
and sea creatures live at even at the lowest depths of the ocean, where
they serve as prey and predators of their fellow organisms.
