Rust: What is the difference between enumerate and zip?

1let v = vec!["a", "b", "c"];
2
3// enumerate: (0,"a"), (1,"b"), (2,"c")
4for (i, item) in v.iter().enumerate() {
5    println!("{}: {}", i, item);
6}
7
8let indices = vec![0, 1, 2];
9// zip: (0,"a"), (1,"b"), (2,"c")
10for (i, item) in indices.iter().zip(v.iter()) {
11    println!("{}: {}", i, item);
12}