कौन सा पावर-सेविंग मोड वर्तमान स्थिति और डेटा को मुख्य मेमोरी (RAM) में रखकर कार्य को तुरंत फिर से शुरू करने की अनुमति देता है?

Which service of an operating system manages the allocation of hardware resources such as main memory, CPU cycles, and file storage to different users or tasks in a multi-user environment?

Identify the operating system from the following options that is primarily designed for mobile devices rather than standard desktop computers or laptops.