Clarifiction on use of -ing

[Lynne B]

Could you explain the following usages:
People like to know where their food comes from.
How do I explain the use of comes from v is coming from.

Also
100 percent of the produce arriving today is fresh.
Again, the explanation for arriving vs that is arriving

[teechar]

Hi Lynne B, and welcome to the forum.

Could you explain the following usages?
People like to know where their food comes from.

Use that when making a general statement.

You can use the "-ing" form in the context of a specific scenario/when talking about a specific food item; e.g.,
The residents at the retirement home like to know where their fish is coming from.

100 percent of the produce arriving today is fresh.
Again, the explanation for arriving vs that is arriving

"That" is implied in that sentence.
In future, please start a new thread for unrelated questions.