Which of the following best explains why it is important to protect rivers? a) we depend on them to provide us with our main source of food b) without them we would lose money made through overseas trade c) we depend on them to me our basic needs by providing drinking water d) without them animals in marine ecosystems would become overpopulated

(D) without them animals in marine ecosystems would become over populated

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.