In context of overlay "Places" – Kapaleeswarar Temple (Hindu Temple) – node/289373830 via StreetComplete 63.1:

This is a duplicate. We can retain the other one.

In context of overlay "Places" – Hotel Karpagam (Hotel) – node/13839680356 via StreetComplete 63.1:

This is misplaced. It is aroun 200m to the left of its current position just before Aishwarya Stores.

Attached photo(s):
https://streetcomplete.app/p/345268.jpg

Unable to answer "What religion is practiced at this place?" – Sathya Sai Seva Samithi (Place of Worship) – node/3240614814 via StreetComplete 63.0:

For sai baba devotees

Unable to answer "What’s the structure of this bridge?" – Mambalam Canal Bridge (Bridge Area) – way/1237267133 via StreetComplete 63.0:

This is a flyover. None of shown options seem to suit since they seem to be related to bridging two unconnected areas