Significant changes during the substage involve the coordination of schemes and intentionality

The answer to this question is "Secondary circular reactions". During this time, the significant changes substage involve the coordination of schemes and intentionality. The infant is progressing since coordination of touch and vision, as well as the eye. The secondary circular reactions occur in between 4 months to 8 months. 

Republican William McKinley won the American presidential election of 1896. He acted quickly to sign a new annexation treaty shortly after he took office in 1897. ... Thus, the fate Of Hawaii became entwined in the larger debate over whether the United States should acquire an overseas empire.