Which relationship is shown in the graph?

*shown below*

a. competitive exclusion relationship

b. habitat-niche relationship

c. biotic-abiotic relationship

d. predator-prey relationship

The answer is D as there are fluctuations which means that changes in the population of one affects the population of the other. as prey pop increases predator pop increases leading to a decease in prey pop which causes predator pop to decrease due to lack of food then prey increases and the cycle repeats

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Carbon monoxide is the answer: )