How did tilapia change lake Victoria ?

The second option and/or third option is correct.

Explanation:

I did a case study on the addition of Tilapia to Lake Victoria with OneWorld.

The effects are listed in our publication.

"In efforts to improve food production and bolster the fish-export business in Eastern Africa, the Tilapia was introduced to Lake Victoria, the largest tropical lake in the world, which serves as the main source of sustenance for the people of Kenya, Tanzania, and Uganda. Instead of improving the fishing opportunities in the lake, however, the Tilapia has caused the decimation of several fish populations.

Tilapia’s aggressive and omnivorous feeding behavior outcompeted native species or utilized native species themselves as a food source. Indigenous cichlids play a major role in reducing detritus, but with severely decreased numbers, their ability to consume this organic material is diminished. As the detritus decays and sinks to the lake floor, it absorbs oxygen. The decimated cichlid population led to unprecedented amounts of detritus, which has depleted oxygen at the lowest levels of the lake and created dead zones. Lake Victoria, considered one of the most species-diverse lakes in the world, has seen its cichlid population drop from 400 to 200 species due to the introduction of the Tilapia and other invasive species, such as the Nile Perch."

what's this it's not giving you what have to do.

marginal cost is a microeconomic measure that us to evaluate the extent to which the level of production of a good is sustainable in accounting, that is, to how many quantities the company plans to profit from the production of the good.

the concept of marginal cost is simple, it means the cost of producing one more item. for example, in the case of pies, the marginal cost is the cost of producing one more pie than those that have already been produced.

it is important to understand that productive activity influences marginal cost. the marginal cost of some goods can be very high, while others may be insignificant. for example, the marginal cost of producing an extra plane is very high. already the marginal cost of a water company to provide 1l more water is derisory.

in the case of pies, the cost involves the inputs, the labor and the fixed cost, which involves the fixed space of the bakery. the level of production initially has the marginal cost decreasing because there is space and manpower available. however, to produce more you have to hire more workers and buy more inputs. if physical space is limited, workers will conflict with places, inputs and their productivity will decrease, meaning there is an optimum point of production for each level of space and manpower. from this point on, the productivity of the workers will be getting smaller because of lack of space, so that the marginal cost of producing one more pie will be increasing. so, although you have not posted the chart, but if you have the answer, you can see that my explanation goes according to the marginal cost curve that will increase from the 4th pie, answer (c).