They can trade over sea, in an airplane, by foot or on land...it just mainly depends on the country.
Yes, Countries can trade with each other without free trade agreement.
Countries trade with each other because they don't have some of the natural resources that they want.
The sizes of the mountains make trade difficult.
They help trade
Every single country relies on each other for trade.
They compete with each other in the farming industry due to arable land.
Countries that trade or exchange goods with each other are referred to as trading partners. This relationship can exist on a bilateral basis (between two countries) or a multilateral basis (involving multiple countries). Trade agreements often facilitate these exchanges, promoting economic cooperation and growth among the involved nations.
The countries are more likely to trade with each other
Same reason other countries do. To get unique imports and exports sent to each other.
A global trade pattern is how countries trade with each other. It is also known as international trading. Industrialization has a huge impact on how trade is effected.
It is so important that countries communicate with each other because misunderstandings can lead to hatred and even war or genocide. It is also important to communicate in order to establish trade between countries.
In general, trading blocs are groups of countries that give preferential treatment in trade and tariff agreements to each other, but discriminate in similar trade and economic matters to "outside" countries.