The most important resource was gold, followed by silver.
Because Mexico and Central America were once colonies of Spain.
When Mexico achieved its independence from Spain in 1821, Central America was part of Mexico. It later seceded without any bloodshed.
America has brought change to the world. This is something that Spain, Mexico and European could not do.
Spain
There are may people in the United States who attend bullfights in Mexico or Spain but there are no true bullfights in this country. Bulls may not be injured or killed.
Central America, was part of New Spain, its capital Mexico City all the decrees came from Mexico City, the government was named in Mexico City, after all New Spain was the bigest and wealthiest viceroyalty in the Spanish Empire.
Spain and Portugal qualify as such.
Mexico and the countries of Central America are sometimes known as Latin America. This comes from the fact that they were once largely a part of Spain, a Latin country of Europe.
mexico, central america, south america, and parts of the southern usa
In all its history, Spain has never taken over Austraila. Perhaps you meant South America and Central America? If so, the basic answer is the prospect of wealth, chiefly gold and silver. The wealth did not eventually benefit Spain.
America has brought change to the world. This is something that Spain, Mexico and European could not do.
By the 19th century, most of Mexico & Central America had revolted and became independent of Spain.