中 Zhōng is 'middle'
Common words: 中国 Zhōngguó 'Middle Kingdom, China', 中心 zhōngxīn 'centre'
钟 Zhōng 'bell'
Example: 三点钟 sān diǎn zhōng '3 o'clock'
The traditional character is: 鐘
种 Zhǒng is 'sort'
Example: 种类 zhǒnglèi 'sort'
This character is also read zhòng 'to plant'.
The traditional character is: 種
Imagine an arrow going through the middle of an apple: