how to correct it ?

type of the paths down which volcanic lava flows best really depends on the terrrain ,since some areas facilitate better ~~~~

movement than others.

"type "is not suitble for the sentense,but ,i do not know how to correct it ?

can you write out the whole sentence?

i guess the correct sentence is:

Typing the paths down which volcanic lava flows best  really depends on the terrrain ,since some areas facilitate better ~~~~movement than others.

The main sentence is:  Typing the paths depends on the terrain.

down which volcanic lava flows best   是 the paths  的定从

Thank you .

so "typing the paths depends on the terrain", the "typing" in here means  “鉴定or 区分 paths的类型” ？

in this sentence, typing = finding out

oo~~~thank you！