One difference between the rabies and influenza viruses is that the influenza virus can be cured if it comes in contact with humans while the rabies virus can not be cured once humans contract it. The rabies virus does not have a segmented genome while the influenza virus does.
The rabies virus spreads through animals (well known carriers of the disease are dogs and cats, there are also squirrels) and it can cause deadly affects. While the flu is passed around between humans and is easily treatable and a lot less deadly than rabies. (Even though the flu can lead to death by causing a colossal amount of inflammation in a person's lungs, which can lead to respiratory failure. Also, when someone has the flu, they become more vulnerable to a bacterial infection that can lead to pneumonia.)
Grain farming is done for economic activity and this makes it commercial. It is highly specialized and mechanised. The yield per acre is low so the farms are big. The yield is high per man so little manpower is needed for production. Grain farming is subject to market conditions like climate.
Animism is the belief that everything has a soul or a spirit. Polytheism is the belief of more than one God. Monotheism is the belief in one God or the oneness of God.