What positive developments resulted from the conditions in China during the Warring States period? The need to have more soldiers resulted in less crowding in cities. The need to build stronger walls led to advances in architecture. The need to supply large armies resulted in increased food supplies. The need to have better protection led to innovations in tools and weapons. I NEED HELP ASAP I WILL GUVE BRAINLIST ʕ•ᴥ•ʔ ꨄ ㋛

The need to have better protection led to innovations in tools and weapons.

Explanation:

The Warring States Period is the name given to the period in Chinese history between the 400s BC and the 200s BC. The period was characterized by wars between a number of relatively small states, and ended when China was united by the Qin Dynasty.

The greatest technical innovation of the Warring States period was the introduction of iron tools. Not only in handicrafts, but also in agriculture and military equipment, iron became the predominant material instead of bronze.  

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.