Unable to answer "What’s the structure of this bridge?" – Ned Flanders Crossing (Bridge Area) – way/1035476230 via StreetComplete 63.1:

Flat bridge, no bottom supports.

In context of overlay "Buildings" – Transit Shelter – way/1369826918 via StreetComplete 63.1:

Bus stop

Unable to answer "What are the opening hours here?" – Walmart Pharmacy (Pharmacy Counter) – node/3699278141 via StreetComplete 63.1:

Moved to near the southwest entrance

Unable to answer "Does this road have lane markings?" – Baltimore Street (Residential Road) – way/914555214 via StreetComplete 63.1:

Intersection. No markings.

In context of overlay "Sidewalks" – Madison Avenue (Tertiary Road) – way/250694276 via StreetComplete 63.0:

Shown separately on the map

Fort Stevens visitor center

via StreetComplete 63.0

Attached photo(s):
https://streetcomplete.app/p/336738.jpg

Unable to answer "Does this crosswalk have tactile paving on both ends?" – Unmarked Crossing – node/8287466546 via StreetComplete 63.0:

No crossing

Unable to answer "Is there tactile paving on this curb here?" – node/11031890585 via StreetComplete 63.1:

No curb

Stairs here (is there an osm tag for that?)

via StreetComplete 63.1

Attached photo(s):
https://streetcomplete.app/p/341776.jpg

Unmarked building, house #607

via StreetComplete 63.1