The option that will not contribute to ethylene building up in Ryland's cooler would be gas leaks.
Ethylene plant hormone
Ethylene is an important hormone for plants that regulate processes such as leaf/fruit abscission, fruit ripening, and senescence.
Thus, keeping succulents and cacti, old flowers, and ripening fruit in the cooler would be a good recipe for ethylene building up in the cooler.
Gas leaks may not find its way into the cooler as long as it is closed.
More on ethylene can be found here: https://brainly.com/question/14797464
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