Step 1: Understand the question.
We need the Indian city given membership in the WHO Global Network for Age-friendly Cities and Communities.
Step 2: Identify the city.
Warangal in Telangana earned this recognition for its work to improve life for the elderly.
Step 3: Why it qualified.
The city built elder-care corridors, digital safety links and senior-friendly parks, meeting the network's criteria.
Step 4: Rule out others.
Kozhikode and Kochi are known for palliative care, and Madurai for healthcare centres, but Warangal secured this specific membership.
Step 5: Conclude.
The city is Warangal in Telangana.
Answer: Warangal in Telangana