OK, I'll take a stab at it.
Pic 1: I like the rock in the grass, but the focus isn't right. Does it look a blurry to anyone else?
Pic 2 and 3: Both nice, I like the angle with the branch. Try a fill flash next time for fun.
Pic 4: I see what you were going for but it's a tough subject. The angle makes it very interesting but it needs to be centered.
Pic 5: My favorite. I like the low angle and DOF you got in that pic.
Pic 6: I like the angles and composition but the focus should be on the zebra not on the structure in the back.
Pic 7: Hard to say a lot about that one. Can't tell where the focus is.
All in all I would say excellent work! It's fun to to try new things and see what happens.
D4D