In context of overlay "Buildings" – Building – way/1355242573 via StreetComplete 60.3:

This restroom building is part of a new park: Ridge Lake Park in Sugar Hill.

Attached photo(s):
https://streetcomplete.app/p/275552.jpg

Smart Food Mart 2 - an Exxon-branded gas station/convenience store

via StreetComplete 60.3

Attached photo(s):
https://streetcomplete.app/p/272494.jpg

This building is still here, but has been renamed to "Snellville Community Church" (https://www.snellvillecc.org)

via StreetComplete 60.3

Unable to answer "Does this crossing have an island?" – Unmarked Crossing – node/11380322659 via StreetComplete 60.3:

It has an island, just not one specifically for pedestrians.

Attached photo(s):
https://streetcomplete.app/p/271703.jpg

Unable to answer "How is this power line attached?" – High-Voltage Tower – node/1826419169 via StreetComplete 60.3:

There are two power lines here, a distribution and a transmission line. The distribution line is supported from below, but the transmission line is horizontally fixed.

Attached photo(s):
https://streetcomplete.app/p/268019.jpg

Unable to answer "Do the trees here have needles or leaves?" – Natural Wood – way/1228976519 via StreetComplete 60.2:

There don't seem to be any trees here, just grass.