Upwelling replaces nutrient-poor surface water with nutrient-rich deep water
a. salty, less salty
b. cool, warm
c. salty, saltier
d. warm, cool

First blank is warmer

Lst blank is cooler.

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.