Final answer:
Service of process is the term used for the delivery of a summons or notice to appear in court to a defendant's last known address, ensuring the defendant is informed of a legal action and the opportunity to be heard.
Step-by-step explanation:
The delivery of notice to a defendant to appear in court or summons to his or her last known address is commonly referred to as service of process. This process ensures that a defendant is given proper notice of legal action against them and is provided the opportunity to be heard. In the context of a criminal trial, venue refers to the geographical district where the crime was committed and where the trial will be held unless a change of venue is granted. The legal system prioritizes transparency and fairness in the prosecution of the accused, underscoring the importance of due process, which includes the right to be informed of the charges and to a fair trial.