Describe Euclidean distance in your own words. What happens to the Euclidean distance when there are large number of features (columns)?

Describe Euclidean distance in your own words. What happens to the Euclidean distance when there are large number of features (columns)?

The initial post must be between 250-300 words in length and is due by 11:59PM EST on Thursday. At least two replies to other students are due by Sunday at 11:59PM EST. Responding to at least two other students is a requirement; posts must be submitted on time and each peer reply per question must be between 150-200 words in length.