Ow does the environment cause the evolutionary development of adaptive radiations?

Please consider the following question carefully.
How does the environment cause the evolutionary development of adaptive
radiations?
Write a short essay concerning this topic. Your paper should be between 300 and 600
words. In accordance with a college level course, your answers need to be well
constructed, supported by specific examples from the book (when appropriate, use page
numbers when using examples from the text) and free of mechanical errors (spelling,
grammar, punctuation). In your answers please be sure to incorporate discussion of the
following:
a? Speciation
a? Niche
a? Biodiversity
a? Convergent Evolution
this is the books
books.google.com/books/about/Your_Inner_Fish.html?idc008kdNwR1cC