Answer:
A canal that connected the Hudson River to Lake Erie.
Explanation:
The construction of this channel was something innovative and that generated very positive reactions to the public. First, this was a bold construction that used many innovative concepts, being considered one of the newest wonders in the world. Secondly, this construction would improve the lives of many people, as it would allow a fixed and continuous connection from the northwest to New York, facilitating transportation in a great way.
The amount of heat they are exposed to has a lot to do with the inferences and observations that they make on the density of the earth's core. The inner core is the most compact due to the fact that they have a lot of direct exposure to heat and the gravity of the earth pressung down on it. The inner core is less subjected to those conditions.
Your answer is Permafrost
