Should new housing developments be required to include green spaces and parks?

Kinda. I think they should be required to be within, at most, a 10 minute walk of a green space or park. If they are not, I would then say that such housing development should be required to include said green space or park.

Yes, so that people can get entertained and want to live in these houses, but allow them for every age until 18.

No, but all housin developments should be required to have these services within at most a mile. If they do not, then the developments should be required to build them./

There are plenty of Brownfield and greyfield sites that can be developed, green belt should only be considered

Yes - and a garden at least the same size as the footprint of the house - gardens and space are good. Gardening and growing your own vegetables are vital skills and support the environment and quality of life . The way housing estates are often laid out is a disgrace

Circumstantial: if Urban jungle needs parks and green spaces. Otherwise ones with close proximity to parks/nature should be fine without.

It depends. If the government builds high density buildings like towers, which I am against, then they should build them with green spaces. If the government pass a law where buildings should be no more than 5 floors, green spaces or park should be reachable within 10 min walk. I don't think every new building should have their green space.