One difference between the technology of the Plano and that of the Clovis and the Folsom is that the Plano hunted bison using stone weapons. perfected a single type of stone point. made clothing from animal hides. developed a variety of stone points.

Option:  developed a variety of stone points.

Explanation:

Paleo Indians were the first people who lived in North America. They arrive from Siberia through passing the Bering Land Bridge. They killed animals for food and survival in the cold and wild environment. They also gathered roots, berries, wild plants, nuts for food. Plano, Clovis, and Folsom are three different Paleo-Indian cultures. Plano culture found in Colorado.  The Plano developed a variety of spears with sharp points made of stone to hunt animals.

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.