What does the author describe in the passage? the history of the hoover dam and its impact on the southwest region the development of different types of hydropower the political environment in america during the construction of the hoover dam improvements in irrigation along the colorado river before the hoover dam was built

Its strengthits conductivity of heat and electricity its shiny colourmalleable and ductility

Its the second one nonmetals are moldable and easily shaped 

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.