Answer:
a.Indirect
b.direct
c.idnirect
d.direct
e.indirect
Explanation:
if you wnt to know which is direct or indirect you need to see if something increases the other will decrease this will be indirect
and if both increase or decrease then this is direct
like for example how many men working and and how much time it would take it is indirect cause the more the men the less the time , the less the men the more the time it takes to finish