Which option correctly answers: what is an ecosystem?

✅ B. Thermometer

a: Barometer | b: Thermometer | c: Seismometer | d: Voltmeter Read more

✅ A. red-brown liquid

✅ A. Sugar

✅ B. An area where water covers or saturates the soil for part or all of the year

a: A dry dune | b: An area where water covers or saturates the soil for part or all of the year | c: A volcanic crater only | d: A glacier peak Read more

✅ D. The Sun

a: Proxima Centauri | b: Polaris | c: Sirius | d: The Sun Read more

✅ B. Nuclear fusion

✅ C. Injection of heroine

✅ C. Coal