Here,

1. "there " refers to the selfish giant's garden.

2. "they" refer to the children who used to play in the selfish giant's garden.

3. they are saying so as they are not allowed to enter and play inside the garden.

Here,

1. The selfish giant is the speaker.
2. He is speaking to himself.
3. He is referring to the children's who used to play in the garden
4. He is saying "the children's are the most beautiful flowers of all" as he realized the children are the soul of the garden.

The children use to play in the selfish giant's garden.

The main theme of this story is consequences of selfishness.

yes, god punish those who are cruel to children and those who are very selfish.

The snow-covered up the grass with its white cloak whereas the Frost painted all the trees silver

The giant heard the mellifluous chirping of a bird when he was lying in his bed.

He realized his mistake when the children stopped visiting the garden and the garden never experienced the other seasons than winter.

Both symbolism and personification are used for "winter, frost, snow, north wind. hail and little child'. The little child is compared to Jesus Christ.

TM Wilde's story is rich in symbolism. The Giant, the children, the seasons, the tree, the garden, the comer of the garden, the snow, the wind, the frost, and the little boy are the well-noted symbols in the text. In this regard, the Giant symbolizes the obsessive mentality of the humans, as they think they can survive independently on their own and they don't need others. Similarly, the children stand for innocence and love. The garden also reflects the innocence of the children. But with...

If the author would be an Atheist then even though he would not give reference about god , as he human he would definitely see the child as the gift of nature who had come to show selfish giant what power the nature holds.