"This is my husband Mohamed."
Translation:هٰذا زَوْجي مُحَمَّد.
Duolingo punishes those who make the effort to type the answers by requiring a very special sign on the هذا and هذه. The Alif Khanjariyah. A practically never written tashkil that nobody actually knows or cares about and which is not even available on the keyboard. It is possible to copy the correct answer after getting it wrong once and then paste the weird word every time a hatha or hathihi is required. My guess is that the implementation of this absurdity is the merit of an MSA nerd who set up a monument to himself here. May Allah have mercy with him. more info: https://en.wikipedia.org/wiki/Arabic_diacritics#Alif_Khanjariyah