Picking vegetables is a verb object phrase with the meaning of picking and harvesting, which refers to picking plants from plants, while picking vegetables is a verb, which refers to the action of processing vegetables, with the meaning of selection, so it is completely different in meaning and use.
Although there is only one word difference between picking vegetables and choosing vegetables, they express completely different meanings. Picking vegetables refers to picking some plants from the plants, and choosing vegetables is to select the useful parts of the vegetables and remove the useless parts, with the meaning of selection.
Generally speaking, picking vegetables is a verb object phrase, which means picking and harvesting. For example, you go to the vegetable garden to pick vegetables first and wait for me to cook when I come back; Choosing dishes is used as a verb to refer to the action of dealing with dishes. For example, you choose dishes today and I cook.
The two are completely different in use, so we should make an accurate distinction when using them to avoid specious errors. After all, there is a great difference between picking vegetables and processing vegetables. If we don't pay attention, it will give people wrong tips.