You need to determine the type of Azure service required to fit the following requirements and specifications: 
Data classification: Unstructured 
Operations: 
• retrieve only by ID 
• Customers need a high number of read operations with low latency 
• updates and creates will be somewhat infrequent operations and can have higher latency as compared to read operations 
Latency & throughput: Retrievals need to have high throughput and low latency. Updates and creates can have higher latency as compared to read operations. 
Transactional support: Not needed

Answer options:

A.Azure Cosmos DB
B.Azure Route Table
C.Azure SQL Database
D.Azure Blob Storage
E.Azure Queue Storage

Correct Answer: D 
Azure Blob storage allows storing the files like videos and photos. It works in collaboration with Azure Content Delivery Network (CDN) by caching the content that is used more frequently and storing this content on edge servers. It decreases latency in providing those images to the users. 
Azure Blob storage also allows moving images from the hot storage tier to the archive or cool storage tier, to decrease the costs and increase throughput on the most frequently retrieved or viewed photos and videos.
Option A is incorrect. Using Azure cosmos DB won’t meet the requirements.
Option B is incorrect. Using Azure Route Table is not the right option.
Option C is incorrect. Azure SQL Database stores the structured data.
Option D is correct. Azure Blob Storage is the right choice.
Option E is incorrect. Azure Queue Storage is not the right choice as per the requirements.
References: 
To more about Azure blob storage, please visit the below given links: 

https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blobs-introduction
https://docs.microsoft.com/en-us/azure/storage/common/storage-introduction#example-scenarios