Technology vs society - Defininf /non defining clauses

Spending too much time on social media is something______  a feeling of isolation.

• who leads to

• where leads to

• that leads to

• when leads to

People _____  hours on their screens every day become dependent on technology.

• when spend

• who spend

• where

• which spend 

He’s never been someone _______ his phone a lot. It’s very hard to contact him!

•  who uses

• which uses

• where uses

• when uses

My friend Jenny, the girl________, just gave a speech.

• which is holding the placard

• where who is holding the placard

• who is holding the placard

• when is holding the placard

Radiation, _____________, could be the reason your phone gets hot.

• which is produced by mobile phones

• who is produced by mobile phones

• when is produced by mobile phones

• where is produced by mobile phones

Defining or non-defining clause?:

"PEOPLE WASTED TIME DOING TASKS THAT WERE DANGEROUS, DIFFICULT OR REPETITIVE."

• DEFINING RELATIVE CLAUSE

• NON-DEFINING RELATIVE CLAUSE

• BOTH OF THEM

• NONE OF THEM