MR LAMB: Look, boy, look.... what do you see?

DERRY: Just....grass and stuff. Weeds.

MR LAMB: Some call them weeds. If you like, then.... a weed garden, that. There’s fruit and there are flowers, and trees and herbs. All sorts. But over there.... weeds. I grow weeds there. Why is one green, growing plant called a weed and another ‘flower’? Where’s the difference. It’s all life.... growing. Same as you and me.

DERRY: We’re not the same.

MR LAMB: I’m old. You’re young. You’ve got a burned face, I’ve got a tin leg. Not important. You’re standing there.... I’m sitting here. Where’s the difference?

Question 1 of 4

Like the play, the given extract is a study in contrasts.
What does Mr. Lamb seek to do by bringing up distinctions?