It is good if we know what your prompt is. Without knowing that it is difficult for us to understand what your topic expects you to write.
Yes, it is good if you can include the purpose of your writing because that allows others to provide you with more meaningful, especially task related feedbacks :)
Are you preparing for IELTS or TOEFL? Or is this for a classroom assignment?
he species are exposed to winds, rains, sun rays, snowfalls
and other unfamiliar environmen
tal conditionsand humansso , they have no choice but relocating to find shelters.
This is a well written essay. You display very good writing skills, good grammar, excellent vocabulary etc. :)