1a-I) 交流 

jiaoliu

exchange

hand over/deliver/mix + flow

1a-II) 交付

jiaofut

to deliver

hand over/deliver/mix + hand over

1a-III) 交换

jiaohuan

to exchange/swap

hand over/deliver/mix + change

change: hand + shine

1a-IV) 外交

waijiao

diplomacy

outside + hand over/deliver/mix

1c-I) 比较

bijiao

to compare / relatively / comparison

compare: person/spoon + person/spoon 

1d-I) 学校

xuexiao

school

learning + school

1d-II) 校长

xiazhang

principal, headmaster (of a school)

school + elder