Ticks carry bacteria that cause lyme disease. ticks do not get lyme disease, but they can transfer the bacteria to humans, who can get the disease. which of the following statements best describes the relationships among the bacteria, the ticks, and the humans?
a. the relationship between the bacteria and the ticks is competition, and the relationship between the ticks and the humans is predation.
b. the relationship between the bacteria and the ticks is competition, and the relationship between the ticks and the humans is parasitism.
c. the relationship between the bacteria and the ticks is commensalism, and the relationship between the ticks and the humans is parasitism.
d. the relationship between the bacteria and the ticks is commensalism, and the relationship between the ticks and the humans is predation.

Commensalism is a relationship between two organisms in which only one of them has benefit, and the other one is not affected. Bacteria are carried by ticks, so bacteria have a benefit from the relationship. Tick is not affected by bacteria, it does not get Lyme disease. Therefore, the relationship between ticks and bacteria is commensalism.

The relationship between ticks and humans is parasitism. Parasitism is non-mutual relationship between two organisms in which one of them (tick) benefits at the expense of the host organism (human).

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.