The first category
A green plant in fields that sheep and cows eat.
grass
It is similar to a door, but outside in the garden
gate
If you throw this for a dog, it'll run after it and bring it back.
stick
You can build this to stop people looking into your garden
fence
The word for a baby sheep
lamb
It's like a lake, but smaller
pond
The male farm bird wakes you up very early in the morning.
cockerel
They grow on trees and are green in summer and brown in autumn
leaves
Walking up one can sometimes be difficult, walking down is easy
hill
An adjective to describe a fruit that's ready to eat
ripe