Final answer:
Traction is generally poorest at the freezing point of water (32°F), where icy conditions reduce friction and increase the likelihood of slippage. Therefore, the correct answer is a. 32°F.
Step-by-step explanation:
The subject of the question pertains to the field of Science, specifically Physics, as it relates to the concept of traction and temperature. Traction refers to the friction between a body and the surface on which it moves. The question aims to identify under which temperature conditions traction is poorest, with options suggesting different temperatures and a geographical location for comparison.
The student is asked to choose from four options where traction is considered to be the poorest. The underlying scientific concept here is that traction is generally worse under weather conditions involving water in its various forms - snow, ice, or rain - which usually occur at temperatures around the freezing point of water.
Therefore, the correct option that adheres to this understanding is a. 32°F, which is the freezing point of water. This temperature often results in icy conditions which are notorious for poor traction.