B because if its unneccsary they dont put it in models
Answer:
Explanation: The Big Idea A new wave of immigration in the late 1800s brought large numbers of ... In this module you will read about the changes in society and culture in the late. 1800s. ... a new life. Immigrant Neighborhoods Many immigrants moved into neighborhoods ... Some immigrant communities formed benevolent societies.
to conserve water facilitate two ways,canals are built level.Of there ia a fiffernce in elevation between the ends of a canal,the channel is built as a series of level sections linked by locks
