Give examples of three new types of technology used during ww1and their effects during war?

The new machines guns, airplanes, and tanks were technological breakthroughs as soldiers on both sides were attempting to break the deadly stalemate that ensued because of these newer weapons.  Plz mark brainliest.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

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.