What is contained on the EFI System Partition?

 The EFI System Partition (ESP) is a special partition on a disk that contains the UEFI boot loaders, applications and drivers for the installed operating systems. The UEFI firmware will load these files from the ESP when the system boots. The ESP is mandatory for UEFI boot and it is usually formatted with a FAT file system. The ESP is part of the 101.1 Determine and configure hardware settings topic of the LPI Linux Essentials certification program12.

The other options are false or irrelevant. The Linux root file system is not contained on the ESP, it is usually on a separate partition with a Linux file system, such as ext4 or btrfs. The default swap space file is not contained on the ESP, it is usually on a swap partition or a swap file on the Linux root file system. The Linux default shell binaries are not contained on the ESP, they are usually on the /bin directory of the Linux root file system. The user home directories are not contained on the ESP, they are usually on the /home directory of the Linux root file system or on a separate partition. References:

Linux Essentials - Linux Professional Institute Certification Programs1

Exam 101 Objectives - Linux Professional Institute2

EFI system partition - ArchWiki3

/boot/efi Linux partition: What is, usage recommendations