In the federal system in both Europe and Japan, what did lesser nobles give to in exchange for grants of land?

Answer: the lesser nobles provides military service and protection in exchange for grant of land

Explanation:

In the federal system in both Europe and Japan, lesser nobles are known as knights in Europe while Samurais in Japan

The lesser Nobles provides military service and protection for the king in exchange for land.

The lesser nobles are of higher status in the society and is ranked immidiately under royalty and it has more previledge in the society than other social status.

The lesser nobles gave military protection.

Explanation:

In Europe, these lesser nobles were known as knights, while in Japan, they were known as samurais. Both are types of warriors who came from the lesser nobility, and provided military service and protection to higher lords in exchange for grants of land.