When storing plant seeds, ___________ have fairly good temperatures, but are usually too damp.

Refrigerators are suitable for storing seeds because they help maintain relatively stable temperatures that can slow down the aging process of the seeds, thus preserving their viability for a longer period. The cool environment can protect seeds from heat-related deterioration. However, it is important to note that while refrigerators generally provide a cooler atmosphere, they tend to have higher humidity levels, which can be detrimental for seed storage. Excess moisture can promote mold growth and cause seeds to spoil or lose their viability.

The other options do not provide the ideal conditions for seed storage. Garages often have fluctuating temperatures and varying levels of humidity, making them less suitable. Closets can be too warm or too humid depending on their location and lack of ventilation. Attics typically experience high temperatures and can fluctuate dramatically, especially in hot climates, making them inappropriate for long-term seed storage.