Kleptoparasitism refers to

The correct answer is Stealing food from another predator's catch.

 Key Points

Kleptoparasitism:

• Kleptoparasitism is a form of feeding in which one animal deliberately takes food from another.
• The strategy is evolutionarily stable when stealing is less costly than direct feeding, which can mean when food is scarce or when victims are abundant.
• Many kleptoparasites are arthropods, especially bees and wasps, including some true flies, dung beetles, bugs, and spiders. 
• Cuckoo bees are specialized kleptoparasites which lay their eggs either on the pollen masses made by other bees or on the insect hosts of parasitoid wasps. 
• This may be intraspecific, involving stealing from members of the same species, or interspecific, from members of other species.

Therefore, the correct answer is stealing food from another predator's catch.