Baldwin’s main point is that
white americans are all hostile oppressors of black culture
black americans developed their dialect in honor of their african ancestors
black english is a separate language, not a dialect of american english.
the slave trade forced blacks to develop a secret language, which survives as black english

c.) biotic: snails; abiotic: temperature climate

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.