What is the subject? what does that mean?

When the subject of a sentence performs the action in the sentence the verb in the sentence is in the what ?

Marking brainliestwhy does lysander stop loving hermia and begin loving helena? the magical flower juice was accidentally put in his eyes, making him fall in love with the first person he saw. hermia acts jealous and mean, causing lysander to rethink his feelings for her. helena confides hermia's secret plan to runaway with demeetrius. the magical flower juice has the opposite effect than what was expected.

As a representative of a pharmaceutical company, you have been asked to speak to a group of physicians at a medical conference to introduce a new drug. when discussing how the drug works, which strategy is not appropriate?