つつある - Grammar Discussion

-ing
be -ing

Structure

  • Verb[stem] + つつある

[Something is an ongoing process・Used in more formal settings・ている + つつ can be used with verbs like 帰る、行く、来る to indicate a state/an action that is in progress]

View on Bunpro

I hope this is the right place to add these questions.
Regarding the sentence
アフリカの野生やせい動物どうぶつかずへりつつあるのは残念ざんねんだ。

I answered へっている and was marked wrong. I feel like a hint is warranted here. I usually review with translations/hints off so I went with the first thing that came to my mind. Usually bunpro’s hint/shake system allows me to get to the answer it wants, but somehow it didn’t for this review.