The law of tolerance was given by

Options

A. Shelford
B. Haeckel
C. J. Grinnel
D. Gause

Answer

### Step-by-Step Text Solution:

1. **Identify the Question**: The question asks who proposed the law of tolerance.

2. **List the Options**: The options provided are:
- 1) Shellford
- 2) Heckle
- 3) J. Grinnell
- 4) Gauss

3. **Recall the Law of Tolerance**: The law of tolerance refers to the idea that the distribution and abundance of an organism are controlled by certain environmental factors.

4. **Identify the Scientist**: The law of tolerance was given by the scientist named Shellford.

5. **Explain the Concept**: According to Shellford's law of tolerance, the growth and distribution of organisms are influenced by various factors such as climatic conditions and biological requirements. If these factors exceed the maximum or minimum limits of tolerance, they will regulate the organism's growth.

6. **Conclude the Answer**: Therefore, the correct answer to the question is option 1, Shellford.