A. What are the reasons behind the different rituals of different castes/ethnic groups?​

The "reasons" behind the "different rituals" of "different castes/ethnic groups" are:

Their origin and lifestyle is different due to which differences are bound to arise.

Generally, the rituals are based on the things available locally. ...

Even the beliefs vary.

georgians assisted in financing united states war effort during world war i through both of the following options:

they bought war bonds from the government.

and

they gave food through the creation of victory/liberty gardens.

in about winter like late november to january