How can you tell if labor is scarce?

I would say in a general overview, that if workers are always being looked for to do a job, that labor is scarce. Look at welding for example, there is always a need for welders. When, in the United States, a job is vital, the government might even offer grants to get more people into the labor force, so you could tell that way.

the answer to this question is the third option. hope this

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.