What’s is line A and what is Line B? Please help

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

Can you me with this i really appreciate it

Imagine one batch of soup (batch “a”) is made with 8.19 g/can of salt, according to the recipe, and a second batch of soup (batch “b”) is made with 8.32 g/can of salt. explain which batch would be more resistant to frost damage if it is shipped a great distance in winter and explain why.