I'm NOT 100% sure about this answer but I think it's the Lines of Longitude
Answer:
When the entire lake reaches 40 F, the surface water cools further, dropping below 40 F. Because this water is now less dense than the surrounding water, it will stay on the top and continue to cool. Once the surface water falls to 32 F, it freezes. The freezing then spreads downward into the lake and the ice thickens
Explanation:
A or b or c not d you chose
The threat from acid deposition has been steadily increasing in the 21st century because of the increase in the number of industries during this period. The acid particles get trapped in the atmosphere and falls as raid on earth. These acid particles are increasing with the booming of the industrial sector.
<h2>Answer:</h2>
Robin Redbreast is the Michigan State Bird
<h2>Explanation:</h2>
Michigan designated "robin redbreast" which is also called American robin as the official state bird in 1931 after an election held by the Michigan Audubon Society. The American robin has many rich songs composed of long phrases such as "whinny" and "tut" calls. This bird eats worms, seeds, fruits, insects and other invertebrates.
