What is the difference between @ViewChildren and @ViewChild?

import { Component, ViewChildren, QueryList, AfterViewInit, ElementRef } from '@angular/core';

@Component({
  selector: 'app-list',
  standalone: true,
  template: '<div #item>Item A</div><div #item>Item B</div><div #item>Item C</div>'
})
export class ListComponent implements AfterViewInit {
  @ViewChildren('item') items!: QueryList<ElementRef>;

  ngAfterViewInit() {
    console.log('Total items matched:', this.items.length);

    this.items.changes.subscribe(changes => {
      console.log('List changed! New count:', changes.length);
    });
  }
}