有的 vs 一些

 一些 =  "some" or "a few" 

https://resources.allsetlearning.com/chinese/grammar/Expressing_%22some%22_with_%22yixie%22

我买了一些吃的。

有的  = some (part of a larger whole)

To refer to just certain members of group, you can use 有的 (yǒude). This usage is normally translated as "some" in English. It is often used multiple times in one sentence to refer to different groups.

有的人喜欢打球，有的人喜欢看球。

https://resources.allsetlearning.com/chinese/grammar/Using_%22youde%22_to_mean_%22some%22

公园里有______人：______在跑步，______在打球，______在骑车。

key: 一些，有的，有的，有的