Reasons for the high informal sector employment in s. a

I think S.A here means South Africa. There can be two reasons to explain for the high informal sector employment. The first reason is that they escape from paying taxes. In the informal sector, they conduct business directly by cash, so they don't pay income taxes. The other reason is that regulation laws are onerous for small businesses.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

The answer is d if you are on edgenuity.