2 and 4 is the answer from here and OD

Which of the following could affect the human population? a hurricane makes landfall on an uninhabited island.a deadly virus emerges that can pass from human to human.a civil war breaks out in italy.a solar eclipse occurs.

Which statement best evaluates the impact of the 1929 stock market crash on europe? 1. the united states established high export tariffs to europe that reduced goods exported to germany. 2. the united states promoted domestic policy initiates that reduced jobs on american bases in europe. 3. the united states promoted isolationism that withdrew troops from europe causing germany to pay its own national defense. 4. the united states eliminated loans to europe that caused germany to default on its reparation payments to france.

Business and industries in the 1920's most closely followed the buying demands of a) the government b)farmers c)consumers d)manufactures