Correct

浮动

/ fúdòng / 
Strokes

Definition

to float and drift/unstable

Example

As a Verb

drift; float

1
Shùyè
树叶
zài
在
húmiàn
湖面
shàng
上
fúdòng
浮动
  
。

Leaves were floating about on the lake.

As a Verb

fluctuate

2
Shūcài
蔬菜
jiàgé
价格
suí
随
jìjié
季节
fúdòng
浮动
  
。

The prices of vegetables fluctuate with the season.

3
Fúdòng
浮动
shōurù
收入

fluctuating income

As an Adjective

unsteady; unstable

4
Wùjià
物价
fēizhǎng
飞涨
  
,
rénxīn
人心
fúdòng
浮动
  
。

With the prices soaring, there is a growing anxiety among the public.