Answer:
B. 75%
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1. drought-resistant varieties of crop plants
2. plant disease
3. The food supply gets shifted from the poor to the wealthy.
4. Africa
5. Crops would be burned and convoys attacked to deny food sources to the enemy.
<span>none of the above!
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The statement 'Exploring the relationship between the material in a rock sample and its hardness' correctly describes an experimental investigation (Option C).
<h3>What is an experimental investigation?</h3>
An experimental investigation is defined as a procedure used in the scientific method to test an explanation or hypothesis, which can be confirmed or rejected.
In conclusion, the statement 'Exploring the relationship between the material in a rock sample and its hardness' correctly describes an experimental investigation (Option C).
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