Which type of unemployment is short-term, unrelated to the business cycle, and always present?

1. Frictional unemployment is short-term unemployment that is not related to the business cycle. 2. It covers people waiting to start a better job, people re-entering the job market and first-time entrants. 3. This type is always present and has little impact on the economy. 4. Cyclical unemployment is tied to the business cycle, which rules it out here. 5. Structural unemployment is involuntary and comes from a skills mismatch, and seasonal unemployment is tied to times of the year. _Source: OpenStax Introduction to Business (CC BY 4.0), Ch 1 "Understanding Economic Systems and Business", section 1.4 Macroeconomics: The Big Picture_