Why is mutual help necessary between the countries?​

In the same way, one country also needs help from other countries in order to fulfill their needs. Mutual relation and cooperation are very important for every country because if any dispute and problems arise it can be solved easily by making different agreements.

continues can help each other by lending materials and resource. They can also aid each other in war and in time on need

Explanation:

c is the answer for this

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.