Explanation: "On" is used to specify a particular day, such as "on a week."

Explanation: "On" is used to indicate that something is positioned directly above and in contact with a surface, like "on the shelf."

Explanation: "On" is used to indicate that something is positioned directly above and in contact with a surface, like "on the couch."

Explanation: "Sheds light on" is a phrase used to bring attention to or reveal information about a particular topic, like "sheds light on social inequality."

Explanation: "In" is used to indicate a period of time, such as "in a week."

Explanation: "On" is used to indicate that something is positioned directly above and in contact with a surface, like "on the bed."

Explanation: "At" is used to indicate a specific location or point in space, such as "at the party."

Explanation: "Centered on" is a phrase used to focus attention or revolve around a particular theme or topic, like "centered on the theme of love."

Explanation: "To" is used to indicate anticipation or expectation, such as "looking forward to the weekend."

Explanation: "On" is used to indicate that something is positioned directly above and in contact with a surface, like "on the table."