Jack has always enjoyed solving problems, whether it involved putting a puzzle together or learning how to create a website. His chief personality type according to Holland is likely to be:

Investigative

Explanation: According to Holland, there are six  personality types which include: Realistic, Investigative, Artistic, Social, Enterprising, and Conventional.

Our interest here is the Investigative type of personality individuals  who use abstract and logic intelligently  to solve  problems. These individuals in this group  love to work independently and  enjoy puzzle- like challenges  that employ  critical thinking and intellect, making them love the maths and sciences and mostly end up in professions like Computer scientist, doctors, mathematicians etc

Here Jack who loves solving problems chief personality type according to Holland is likely to be Investigative.

according to hess's theory, when the magma cooled, it would expand and push the tectonic plates apart. it would push the north and south america plates to the west and eurasia and africa ones to the east. the atlantic ocean would get wider but the coastlines of the masses would stay the same.

harry hammond hess was a geologist and a united states navy officer in the second world war. he is considered to be one of the founding fathers of the theory of plate tectonics. he is known for his theories on sea floor spreading, stating that the movement of the continents was the result of see floor spreading. the continents are attached to the plates and do not move separately. the plates themselves shift and change shape, carrying the continents along.