Please give me general information(such as their uses,etc)
on
1.Flowers
2.Photosynthesis
3.Food chain
4.Animals
5.Leaves
Your question is so general, I don't really know how to respond to it. Photosynthesis is the most specific, so I will deal with that.
Since this is not my area of expertise, I searched Google under the key words "Photosynthesis" to get these possible sources:
(Broken Link Removed)
http://en.wikipedia.org/wiki/Photosynthesis
http://biology.clc.uc.edu/Courses/bio104/photosyn.htm
http://photoscience.la.asu.edu/photosyn/education/learn.html
You can do similar searches for your other topics. In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps. Thanks for asking.