Directions: The given question has one blank indicating that something has been omitted.
Choose the word for the given options that could fit in the blank correctly.
Its current was very _________ and could take away big tree trunks.

The correct answer is powerful.

Step-by-Step Explanation:

1. Analyze the Context of the Sentence:
The sentence reads: "Its current was very _________ and could take away big tree trunks."
The second part of the sentence provides a vital clue about the intensity or strength of the current: it is strong enough to carry or wash away massive objects like "big tree trunks".

2. Evaluate the Options:

• compelling: Means evoking interest, attention, or admiration in a powerfully irresistible way. This describes arguments or stories, not physical water currents.
• powerful: Means having great power, strength, or force. A physical water current that can move heavy items like big tree trunks possesses immense force, making "powerful" the most logical and contextually accurate choice.
• powerless: Means lacking power or capacity to act. This directly contradicts the sentence's assertion that it could sweep away large tree trunks.
• gentle: Means mild, moderate, or tender. A gentle current would not be capable of moving tree trunks.
• persuasive: Means good at persuading someone to do or believe something. This applies to speech or reasoning, not natural elements like water currents.

3. Conclusion:
Therefore, the adjective powerful correctly completes the sentence, accurately describing a current strong enough to dislodge and carry away big tree trunks.