There are multiple theories that pertain to play and development for young children.
Theorist Jean Piaget Lev Vygotsky has a theoretical approach to Psychosocial development.
List 3 more theorists and their theoretical approach to children.

your answer is a hope this

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.

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.

you can't, there's no way sorry