In terms of the correct way to hold a hockey stick, which of the
answers is correct?

The top hand on a hockey stick provides all of the control and touch, so it should be your dominant hand. If you hold the hockey stick with your right hand on top of the stick and your left hand down the stick, you are a left-handed shooter.

Explanation:

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.