Which is an example of incidence of disease?

during one year, there were 67 new cases of influenza in center city.

main town’s population decreased by 13 due to the spread of the measles.

in 2008, there were 1,275 people in new town who suffered from cancer.

there were five females who were cured of cancer in diamond city last year.

During one year, there were 67 new cases of influenza in Center City.

Explanation:

Incidence of disease is cases whereby there is new or new or newly diagnosed diseases.

During the above year, there were 67 new cases of influenza in Center city, this is an example of disease incidence.

In the other options, there is no disease incidence since there is no new diagnosis or new disease recorded.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.