Active transport requires energy for nutrient uptake in roots

Steps:

• Identify active transport as movement against concentration gradient using ATP.
• Recall root cells use it for minerals like nitrates from soil.
• Evaluate statements: 1 (energy-dependent), 2 (against gradient), 3 (specific to ions) as correct.
• Confirm all three apply to root absorption processes.

Why A is correct:

• Active transport in roots involves ATP-powered pumps for ions, matching definitions of energy use, gradient opposition, and ion specificity.

Why the others are wrong:

• B omits 3, but ion selectivity is key in root proton pumps.
• C omits 2, ignoring the against-gradient nature essential to active transport.
• D omits 1, excluding the ATP energy requirement central to the process.

Not enough information on exact statements, but assuming standard biology facts, A fits.

Final answer: A