Correct Answer: Transparent

Solution : The correct choice is the second option .

The word transparent describes something that allows light or objects to pass through easily. It's often used to describe materials or substances that are clear, see-through, or easily understood without any hidden or obscured elements.

The meanings of the other options are as follows:

• Indefatigable : This term depicts something that is not more frequently used or untiring.
• Opaque : This refers to something that does not allow light to pass through, making it impossible to see through it. In a figurative sense.
• Reverent : That describes a feeling or attitude of deep respect, admiration, or awe towards someone or something, often in a religious or spiritual context.