The Homestead Strike was when, in 1892, Andrew Carnegie reduced wages at his steel mills in Homestead, Pennsylvania and the union workers refused to accept the cut. The company locked out the union workers and hired nonunion labor and 300 armed guards. The locked out workers gathered weapons and , on July 6, a battle broke out killing ten people.
In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.
The higher you climb, the more difficult it _____ to breathe.
In each of the questions, four alternatives are given for the Idiom/Phrase. Choose the alternative which best expresses the meaning of the Idiom/Phrase and click the button corresponding to it.