What is the percent concentration of oil in the first, second, and third trophic levels in our food chain?

Answers may vary, but the overall trend should show an increase in the percent oil in the mixture at these following percentage:

1st: 1%

2nd: 7%

3rd: 32%

It is noted that the concentration of oil increases with each trophic level.

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.