Answer:

Reason is true

Explanation:

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Verified answer

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The assertion that "Decomposition of vegetable matter into compost is an endothermic reaction" is generally false, and the reason provided does not justify the assertion.

Decomposition reactions can be both exothermic (release heat) and endothermic (absorb heat), depending on the specific reaction and conditions. In the case of decomposition of vegetable matter into compost, it typically involves breaking down organic compounds, and this process is often exothermic because it releases heat as microbial organisms break down the organic matter. The heat generated is a result of the energy released during the chemical reactions involved in decomposition.

The reason provided, which states that "Decomposition reaction involves the breakdown of a single reactant into simpler products," is a description of decomposition reactions in general. However, it doesn't directly support the assertion that the decomposition of vegetable matter into compost is endothermic.

In summary, the assertion is not accurate for the given context, as decomposition of vegetable matter into compost is more likely to be exothermic due to the heat generated during the process.