Recommend and explain the action to be taken to try to restore the lake to its original condition, based on scientific reasoning and include one real world example(write the
reference for your example) that used a similar method / approach to solve the same
problem

the answer is b: 1.4 km/hr

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.