The jet stream brings down colder air from the north into the southern regions of the United States so B . southeast I think.
Process A likely describes a photosynthesis whilst process B describes respiration.
Electrical conductivity tester.
If the bulb begins to glow brightly when the plug is submerged in the unknown solution then the solution has high conductivity.
The bright glow of the bulb resulting from the experiment indicates that the current flows easily through the unknown liquid.
