Yes.
True
True. The Ring of Fire is located along the boundaries of several tectonic plates, where intense geological activity including volcanoes and earthquakes occur due to the movement and interaction of these plates. The presence of multiple fault lines at these plate boundaries increases the likelihood of seismic activity in the region.
If you have ever felt an earthquake you will know they exist. Billions of people have felt earthquakes and many millions of people have been killed by earthquakes. Buildings collapse in many earthquakes. Earthquakes leave plenty of evidence and witnesses behind them that they happened.
By existing.
existing
false
Does the package exist or not.
No, they are not safe. No active creep, that is acting over hundreds of years slowly deforms the crustal rock on both sides of the fault. Ultimately, it leads to the elastic rebound of the rock, that causes big scale earthquakes.
The noun forms for the verb to 'exist' are existence and the gerund, existing.
No, the word exist is a verb (exist, exists, existing, existed).The noun form for the verb to exist is existence.
Products that exist today
There's already an existing agreement between those two.