Answer: activate multiple meanings of the words, and partially activate closely related words
Step-by-step explanation:
Homographs are words with two different pronunciations and meanings. For example, the word "bat" can refer to a piece of sporting equipment or to a winged nocturnal animal.
In a lexical decision task, a subject presented with a single word is required to quickly decide whether the word is real or not, or if it´s a word from his own language. In this case, the decision would most likely be which meaning we think the word has.
Research conducted on homographs in lexical decision tasks predicts that in such a situation, the subject is likely to consider the multiple meanings of the word, and even consider closely related words, before making a decision.