Why is there no any landlocked country in North America and Australia

Because both North America and Australia have sea coasts, North America is a group of countries; yet, because every country in North America has access to the ocean, it has no landlocked countries.

And because Australia is a one united country surrounded by ocean, it does not have any landlocked countries either.

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.