Correct

脾性

/ pí xìng / 
Strokes

Example

As a Noun

temperament; disposition; nature; habits and characteristics

1
Gèrén
各人
yǒu
有
gèrén
各人
de
的
píxìng
脾性
  
。

Every one has his disposition. / Different person, different nature. / Temperaments vary from person to person.

2
Mōqīng
摸清
zhuǎnjīyīn
转基因
pǐnzhǒng
品种
yāngmiáo
秧苗
de
的
píxìng
脾性

get to know the characteristics of the seedlings of the transgenic species