The answers are:
a. physical geography
b. human geography
Geography is divided into two main branches, physical geography, and human geography, and after that, they branch out much more and include the other geographical disciplines in them.
Physical geography is mainly concerned with the study of the natural characteristics of the Earth, both the ones on the surface and the once close to the surface.
Human geography is mainly focused on the study of the human race, the background, perceptions, interactions, organizing, human groups, effects on and from the environment etc.
        
                    
             
        
        
        
Sunna
in Yemen . Overall in the Arabian Peninsula most rain falls in the
South West, and up along the Red Sea coast in the southern half of the
Peninsula. and along the western half of the south coast/ There is also
some rain in the north east. However there are some parts, particularly
the central and south east that hardly ever see rain. Less than 3 cm per
year.
 
        
                    
             
        
        
        
Answer:
Southwest Asia, Southeast Asia, and the Americas. 
Explanation:
Major centers of domestication of plants and animals are Southwest Asia which also known as the Fertile Crescent, Southeast Asia, and the Americas. Plants and animals diffused globally because of the interaction of different cultures with each other. When the two different cultures interact with each other through migration from one region to the new one, both cultures exchanges some of the ways of living and methods. When the English people came to the New world, they introduced cultivation of corn crop which leads to diffusion of plants in the America.