Answer:
it is used for outgoing or recurrent actions in the past
1) Nelson está escuchando música 2) sergio y héctor están viendo la televisión 3) elena esta en el cine 4) estoy enseñando fotografía 5) tu estas escuchando la radio
You put this question in the wrong subject, and according to the lecture much of flamenco music is an expression of oppression and feelings. Hope this helps!
Where organisms use sunlight to synthesize foods from carbon dioxide and water. It generates oxygen as a byproduct.