Correct

因由

/ yīn yóu / 
Strokes

Definition

reason/cause/predestined relationship (Buddhism)

Example

As a Noun

reason; cause

1
Tā
他
bù
不
chīfàn
吃饭
  
,
xiǎngbì
想必
yǒudiǎnr  
有点儿
yīnyóu
因由
  
。

He ate nothing; there must be some reason.