Your React application requires an animation where items enter from the left and exit to the right. Using React Transition Group, which props would be essential to manage the enter and exit animations?

To manage enter and exit animations in React Transition Group for items entering from the left and exiting to the right, essential props include in, timeout, classNames, and appear. These props control the presence of the component, the timeout for the animations, CSS class names for transitions, and whether to apply the animation on initial appearance (appear). The other options either don't exist in React Transition Group or are not commonly used for this purpose.