Left and right are the answers, respectively.
Studies have shown that, like humans, dogs may understand words and intonations coming from humans. In recent studies, scientists hypothesize that the left hemisphere of a dog's brain can process and respond to familiar words, while the right hemisphere of the brain will respond to the intonation.
The invention of compass and astrolabe contributed in a great way for the European expansion. These discoveries helped the Europeans to sail for unknown waters and reach the lands that have never been reached before. before the discovery of the compass and the astrolabe, the explorations were mostly limited along the shoreline and rarely would anybody try to venture into the unknown oceans. These discoveries allowed the navigators to locate their positions by watching the position of the sun and the stars.
...information, social credentials, personal reinforcement, and INFLUENCE.
