Phrases are groups of words that make the sentence complete and meaningful. The correct blanks are genetically modified (phrase) and skepticism (noun).
Genetically modified crops (GMC) are the genetically engineered plant species that are made better than the original species to increase the yield, resist pests, infections, etc.
In the UK the crops have undergone genetic modification but are not accepted by a large population while on the other hand people of America have greatly accepted GMOs.
Therefore, in the sentence genetically modified is the phrase and skepticism is the noun.
Learn more about nouns and phrases here:
https://brainly.com/question/26036497
#SPJ1