Review the chart, which shows the population sizes of three african animals in 1990 and in 2000

The question is incomplete;

Population Estimates of Animals in Africa in 1990 and in 2000

1990 2000
Lions 100,000 47,000
Cheetahs 50,000 7,500
Zebras 15,000 2,500

Which explanation is best supported by the numbers in the chart?

- Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetahs.
- The dwindling zebra population has led to the decline of the predator lion and cheetah populations.
- Overhunting of lion and cheetah populations has led to a decline in the food source population.
- Lion and cheetah populations compete for the food source of zebras, and cheetahs outcompete lions.

I think the answer is - Overhunting of lion and cheetah populations has led to a decline in the food source population

From our previous experiment, we examined how many drops a penny can hold - and place drops of salt water on the penny after recording 5 trials each, take the average of each solution.