Assertion(A): `CO_2` diffuses out of amoeba when it starts accumulating to harmful levels in the cell. Reasoning(R): In large organisms, diffusion alone is far too slow for adequate distribution of oxygen and food. Choose the correct answer

Options

A. A is correct and R is the correct explanation of A.
B. A is correct and R is not the correct explanation of A.
C. A is correct and R is wrong.
D. A is wrong and R is correct.

Explanation

To solve the question regarding the assertion and reasoning about the diffusion of carbon dioxide in amoeba and the distribution of oxygen and food in larger organisms, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that carbon dioxide (CO₂) diffuses out of amoeba when it starts accumulating to harmful levels in the cell.
- Amoeba is a unicellular organism that relies on simple diffusion for gas exchange. When CO₂ levels rise due to metabolic processes, it will diffuse out through the cell membrane to maintain homeostasis.

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