Informal labor is part of every county’s economy

Explanation:

Yes, this is true.

Some examples of informal labour include:

-street food and street vendors

-babysitting

-tutoring peers for money

-private language classes.

Many of these activities are never registered with the tax office and never taxed, but they're a part of the economy.

5.4%

explanation:

their acceptance rate is 5% percent and the graduation rate is 98%

answer; (d) melting of sea ice;