Because of overcrowding, russia and japan are expected to have (blank) population growth in the near future

The answer is little, if an area is overcrowded, then people aren't going to want to go there, they will most likely leave. However, there still will be a little growth.

Assemblies do not have written codes of laws. laws are matters for magistrates and courts, not assemblies. codes of law are things such as civil law, criminal law, and constitutional law. what assemblies have are procedures regarding debating, voting and other business they might carry out.  also note that rome had three assemblies: the assembly of the soldiers, the assembly of the tribes, and the plebeian councils.