It is not a formal essay. Do not write a introduction and a conclusion.
Please read my book before you start writing. You need to only read part 2 in this book ( page 30-75) Following is some requirements for this essay
Write a clear organized summary of Author’s ,main arguments.
(i) identify the major argument he makes in this part of his book.
(ii) briefly describe how he supports each argument. ( What kind of evidence please use book’s examples to do the reference.
(iii) pay more attention to write how natural control environment before human exists.