Final answer:
Okonkwo shows love for his daughter by making medicine to cure her illness, indicating his deep care for her well-being.
Step-by-step explanation:
The character Okonkwo subtly shows his love for his daughter when he cuts plants and makes medicine to cure her illness. This action demonstrates his care and concern for his daughter's well-being, which is a form of expressing his love for her. In traditional societies, such as the Ibo society depicted in the novel, taking practical steps to ensure a family member's health is often a more powerful expression of affection than verbal declarations, particularly for a character like Okonkwo who values strength and action.