Passage: Not much can be achieved by the naked hand or by the unaided intellect. Tasks are carried through by tools and helps, and the intellect needs them as much as the hand does. And just as the hand’s tools either give motion or guide it, so in a comparable way the mind’s tools either point the intellect in the direction it should go or offer warnings.

Cite Evidence According to the passage, what else do people need to help them understand nature?

A.) They need tools to help complete tasks by hand.

B.) They need to make educated guesses.

C.) They need to discuss and debate ideas.

D.) They need tools for both their hands and their brains.

To find the answer to this question, we will need to look for a sentence or phrase in the passage that directly mentions what people need to help them understand nature. Let's break down the options and see which one aligns with the passage:

A.) They need tools to help complete tasks by hand.
This option is mentioned in the passage, stating that tasks are carried through by tools and helps, which the intellect needs just as much as the hand does. However, this option specifically focuses on tasks completed by hand, not understanding nature.

B.) They need to make educated guesses.
There is no mention of making educated guesses in the passage.

C.) They need to discuss and debate ideas.
There is no direct mention of discussing and debating ideas in the passage.

D.) They need tools for both their hands and their brains.
This option is supported by the passage. It mentions that the mind's tools either point the intellect in the right direction or offer warnings. This suggests that tools are needed not only for completing tasks by hand but also for the intellect or the brain.

Based on the evidence provided in the passage, the correct answer is D.) They need tools for both their hands and their brains.