What tense of the under lined verb and what does the tense mean

tense means two things

1:especially of a muscle or someone's body) stretched tight or rigid.

2:"she tried to relax her tense muscle become tense, typically through anxiety or nervousness.

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations. click to let others know, how is it