Explanation
To expose a click event and react to user input in a Lightning web component, the developer should use a method name as the value of the onclick attribute in the template. The method name should be followed by parentheses, as in tileClick(). This syntax indicates that the method is invoked when the element is clicked.
The method should be defined in the JavaScript file of the component, and it can access the event object as a parameter. The other options are either invalid or incorrect. For example, {event:tileClick} is not a valid syntax for an onclick attribute, javascript:avoid(0);tileClick(); is unnecessary and outdated, and {tileClick} is a property binding expression, not a method invocation. References: B2B Commerce and D2C Commerce Developer Guide, Lightning Web Components Developer Guide