The main difference between nonrenewable and renewable resources is which of these? All nonrenewable resources pollute the environment; renewable resources don’t.
Nonrenewable resources exist in limited quantities; renewable resources don’t.
Nonrenewable resources have to be refined before humans can use them; renewable resources don’t.
Nonrenewable resources exist in unlimited quantities; renewable resources don’t.

then that particular organisms become extinct.

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.

currents is the correct answer.

enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.