Which use of the て形 is used in this picture?


The only thing I remember is that the て form may mean "and" but and in this
context have no sense.

[![enter image description
here](https://i.stack.imgur.com/eKyAt.png)](https://i.stack.imgur.com/eKyAt.png)




> > 学校の べんきょうが むずかしく **て、** （......）います。
>
> The only thing I remember is that the て form may mean "and" but and in this
> context have no sense.

The use of て is not limited to mean 'and'.  
In this case it's used to indicate the _**reason**_ of the conclusion of the
predicate.

> **2** 原因・理由を表す。…ので。…ために。「頭が痛くて寝ていた」（[デジタル大辞泉 | て |
> **１-2**](https://dictionary.goo.ne.jp/jn/148945/meaning/m1u/%E3%81%A6/)）




> > 学校の べんきょうが むずかしく **て、** （......）います。
>
> The only thing I remember is that the て form may mean "and" but and in this
> context have no sense.

The use of て is not limited to mean 'and'.  
In this case it's used to indicate the _**reason**_ of the conclusion of the
predicate.

> **2** 原因・理由を表す。…ので。…ために。「頭が痛くて寝ていた」（[デジタル大辞泉 | て |
> **１-2**](https://dictionary.goo.ne.jp/jn/148945/meaning/m1u/%E3%81%A6/)）

