Final answer:
The first process started at the end of the kernel bootstrap is typically '/sbin/init' or 'systemd' on Unix-like systems, which serves as the parent of all other processes.
Step-by-step explanation:
At the end of the kernel bootstrap process, the first process started is typically /sbin/init on Unix-like systems, which is essentially the parent of all other processes. This is because once the kernel has been loaded and initialized by the bootloader, it hands over control to the init process, which is responsible for starting all other system services and user processes, setting up the user environment, and managing system shutdown and reboot procedures. The correct answer to the question is 1) /etc/init, although the path for the init process can vary, with systems like CentOS/RHEL 7 and later using systemd as the init system, located at /usr/lib/systemd/systemd instead. In such cases, the init process, whether systemd or another init system, is the parent of all other processes.