During the era of European expansion, what was the biggest reason for Spain's push for exploration?

Growing capitalism in Europe.

Explanation:

The emergence of growing capitalism in Europe, the discovery of new knowledge in cartography and navigation, new technological advances in shipbuilding, and human curiosity have encouraged people to venture into the unknown. However, the biggest incentive not only for Spain but also for most countries were economic reasons. Spain was such a direct competitor to Portugal, and they tried to beat them in that race. The discovery of new trade routes involved controlling the same and was the main impetus for research.

a countries leader should be motivated by the common good of the country.

1.d 2.a c.!