Explanation:

Here’s the breakdown:

- Nazca plate: This actually *is* one of the major tectonic plates. It sits off the west coast of South America.

- Pacific plate: No question, this is one of the biggest—covers most of the Pacific Ocean.

- Africa with the eastern Atlantic floor plate: That’s not a correct plate name. The proper plate is the African Plate; it doesn’t combine with the “eastern Atlantic floor.”

- India-Australia-New Zealand plate: This is a mash-up. The actual major plate is called the Indo-Australian Plate. New Zealand sits on the edge of this plate, but it’s not grouped like this officially.

Option 3 – Africa with the eastern Atlantic floor plate isn’t a major tectonic plate by the proper name.