An introduction is the first set of information it is found at the beginning of your portfolio. The goal of your introduction is to explain to the reader what the
topic is about and what your portfolio is all about. Your introduction lets your
readers know what you hope to achieve and what they can expect from your
assignment.
The introduction is a brief paragraph which should be not be longer than one (1)
paragraph.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.

Cells are the smallest. bones, muscles, and tendons are all made up of different type of cells.hope my answer you : )