Which tool is used to streamline installing and managing Kubernetes applications?

apt is a package management system for Debian-based Linux distributions, not for Kubernetes applications.

Helm is the de facto package manager for Kubernetes, allowing users to define, install, and upgrade even complex Kubernetes applications using "charts." Charts are packages of pre-configured Kubernetes resources, making application deployment and management much simpler and repeatable.

service is a command used to manage system services on Linux, not a tool for Kubernetes application management.

brew is a package manager for macOS and Linux, not for Kubernetes applications.