Ayuda porque me salen preguntas en otros idiomas,, asi no los puedo responder

Which of the following is necessary to build a skyscraper? a. wooden beams b. metal beams c. plastic supports d. all of the above

The depth of people's religious feelings and how they translate those feelings into behavior. answer is ethicalism

Which clef would be used for the violin? a. treble b. tenor c. bass d. alto what causes sound? a. electric fields b. magnetic fields c. vibrating electrons d. vibrating molecules