Up Close on Sculpture

Recently I’ve collected various bits of debris on the beach to recycle and thinking about what is art. I consider myself to be quite creative and open to ideas, but art is very subjective isn’t it? I may be interested in Tracey Emin but I wouldn’t want to take her work home.
Broomhill sculpture garden has many thought provoking pieces, here are four, each with a close up,

What springs to mind?
What springs to mind?

Thorns?
Thorns?

A splindly tree?
A splindly tree?

Folds
Folds

At work on the pavement
At work on the pavement

I prefer this close up
I prefer this close up

Something from deep in the earth?
Something from deep in the earth?

Creative use of cable ties!
Creative use of cable ties!

Tell me your thoughts, love them or hate them?