Why did russia send troops to the border of austria-hungary in 1914? austria-hungary had invaded serbia, and russia was in an alliance with serbia. austria-hungary was threatening to invade russia. austria-hungary was sending its people to live in russia. austria-hungary needed resisting a german invasion.

this defines the ability for a flex item to grow if necessary. it accepts a unitless value that serves as a proportion. it dictates what amount of the available space inside the flex container the item should take up.

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first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.