Final answer:
The cloud provider's client is primarily responsible for the data hosted in the cloud, although the cloud service provider also has certain obligations related to infrastructure and security.
Step-by-step explanation:
Legal responsibility for data hosted in the cloud can be complex and often depends on the terms of service agreements and local laws. In general, the cloud provider's client is primarily responsible for the data they choose to store in the cloud. This means that issues of data privacy, protection, and compliance typically fall to the client to manage, even though the cloud service provider may have some responsibilities, particularly related to infrastructure and security. The IT department of the client may be responsible for implementing and managing these requirements, but they are not the legal entity held accountable. The end user also has a role in ensuring they comply with the policies set by the client and provider.