Which plays the most important role in providing ease of access to a web app?

Eva has many contacts on the professional networking site she uses which contacts are considered second degree

If the polar bear were taken out of the food chain what would happen to the seal population the seal population would diminish the seal population would grow dramatically the seal population would stay the same the seal population would decrease slightly

Im doing this last minute and literally none of my neighbors or people that my dad works with use excel so if anyone could me make up an example