Write a foreword to Jomo Kenyatta's Facing Mount Kenya: The Tribal Life of the Gikuyu. In it, make
connections between concepts from the lesson – namely job specialization and social stratification
and the book that readers are about to study. Your job is to encourage readers to think about Kenyatta
account in the context of history.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.

the lines on a surface map are called isobars. isobars are lines of constant pressure which are measured in units called millibars. the numbers indicate the amount of air pressure, in millibars, that each line represents.