You are given an array of points where each element points[i] $= [x_i, y_i]$ represents a point on the X-Y plane, along with an integer k. Your task is to find and return the k points that are closest to the origin $[0, 0]$.

The distance between two points on the X-Y plane is measured using Euclidean distance, which is calculated as:

Note: You can return the result in any order. The answer is guaranteed to be unique, except for the order in which points appear.

Constraints:

• $1 \leq$ k $\leq$ ...