Can you describe social and moral impacts to me?

They're just like things that aren't purely design related. It's how it will effect the people and local community around you.

Now, unless you've made a really obscene birdhouse, i'm pretty sure there's no real moral issue. But socially, how will it fit in the place it needs to go? Is it suitable for your intended product audience? Does it in any way offend/ make life difficult for people? will people object to your birdhouse for any reason? Will the birds it attracts be a nuisance, or will they be positive for neighbours? It's basically looking at it from a human perspective.

It's a bit hard for a birdhouse, a better example (for explanation) is something like a rollercoaster at a theme park. people will be employed to build it, and it will be fun, creating positive impacts in a comminity, However, it will be noisy, attract traffic, cause problems for local neighbours : think NIMBY (not in my back yard) and how people won't want it there.

I think it's a bit hard to think like that for a birdhouse though :/