Question
i a beginner and when other say these thing i dont know what thay mean so could you help me out so i know some thing. curve paths and straight paths ? whats that about and focal points bring u into the garden but wat makes a focal point and scale does any way i put my 2 question below.

Describe the effects of space, unity, scale and proportion, and the importance of focal points in your design, specifying features/planting that illustrate these key principles.

Explain the use of colour with reference to the colour wheel and how light, shade, texture and form are used to good effect in a design. Define how each relates to the other.  

Answer
I don't do homework questions ("describe, define, illustrate, explain"....)

However, if you want to explore landscape design issues, here is an EXCELLENT website to check out:

http://www.afcee.brooks.af.mil/ldg/s01LandscapeDesign/c03LandscapePlanning.html

Thanks -

Marc