Final answer:
Zygote is the process that runs on a Dalvik Virtual Machine (DVM) and is launched at boot time on Android devices to help applications launch efficiently. Option A is correct.
Step-by-step explanation:
The process running on a DVM (Dalvik Virtual Machine) that is launched at boot time is known as Zygote. The Dalvik Virtual Machine was specifically designed for Android and is optimized for systems with limited resources, like mobile devices. Zygote is the part of the Android operating system that is responsible for launching the applications on an Android device. When the Android device boots, the Zygote process starts and preloads the common classes and resources needed by Android applications to launch efficiently and more quickly. Xen is a type-1 hypervisor that allows multiple operating systems to run on the same hardware simultaneously. It is not related to the Zygote process or Android.
Dalvik is the virtual machine that executes applications on Android devices. The Zygote process runs on the Dalvik Virtual Machine (or its successor ART - Android Runtime) and helps in the initialization and faster start-up of app processes.