True. Smog is fog combined with other pollutants like smoke than can be from automobiles or cars.
Hope this helps.
Their progress and wealth is highly dependent on the harvests, and the price of grain. They probably have to import some industrial products and if they had a bad year (weather, other catastrophies, poor technology) they can't get the necessary amount of industrial products in exchange for their surplus e. g. in grain. There are so many standards and requirements about the quality of food production that no country can survive solely on agriculture without high quality technology (machines, unharmful fertilizers, research-based breeding, etc.).
.Africa
<span>2.Afghanistian </span>
<span>3.Russia </span>
<span>4.Mediterranean</span>
Answer:
OPTION D
Explanation:
IT OUTLINES THE COOPERATION BETWEEN COUNTRIES FOR SCIENTIFIC RESEARCH
Learned behavior
This is because instinct drives them to eat and find food, but they have to learn that a certain feeder is always out and available
