Select the boxes in the table to show which geographic features are found in each country.

archipelago coastal plain

China

Japan

Korea

Japan

Korea

China - coastal plain

Japan - archipelago

Korea - coastal plain

To determine which geographic features are found in each country, let's go through the list one by one:

China:
- Archipelago: No
- Coastal Plain: Yes

Japan:
- Archipelago: Yes
- Coastal Plain: Yes

Korea:
- Archipelago: No
- Coastal Plain: Yes

So, the boxes that should be selected in the table are:

China: Coastal Plain
Japan: Archipelago, Coastal Plain
Korea: Coastal Plain

To identify which geographic features are found in each country, we need to consider the information given and the options provided (archipelago and coastal plain). To make it easier, we can create a table with the names of the countries in one column and the features in the other. We will mark the boxes that correspond to the specific geographic features found in each country.

Here is the table:

| Country | Archipelago | Coastal Plain |
| ------- | ----------- | ------------- |
| China | | |
| Japan | X | |
| Korea | | |

From the information given, we can see that archipelago is found in Japan. Therefore, we mark the corresponding box with an 'X.'

The final table looks like this:

| Country | Archipelago | Coastal Plain |
| ------- | ----------- | ------------- |
| China | | |
| Japan | X | |
| Korea | | |

For China and Korea, no specific geographic feature is mentioned, so we leave those boxes blank.