Question

which of the following is true for subtropical jet streams?
they blow from north to south.
they blow at the poles.
they bring warm air.
they bring cool air.

Explanation:

Subtropical jet streams are high - speed winds in the atmosphere. They are located at high altitudes. One of their characteristics is that they bring cool air. They do not blow from north to south in a simple linear fashion across the entire globe. They do not blow "at the poles" as they are at subtropical latitudes. And they do not bring warm air (that is more characteristic of some lower - level warm air advection patterns in different weather systems).

Answer:

They bring cool air.