From the given alternatives, select the single word which cannot be formed using the letters of the word RESOURCES. Each letter of the base word may be used only as many times as it appears there.

Introduction / Context:
This word formation question asks you to determine which option word cannot be formed from the letters of the word RESOURCES. These types of questions strengthen your focus on spelling details and the ability to quickly recognise missing or overused letters.

Given Data / Assumptions:

• Base word: RESOURCES.
• Options: Source, Rise, Cures, Sour, User.
• You cannot add any new letters that do not exist in RESOURCES.
• You cannot use any letter more times than it appears in RESOURCES.
• Standard English spellings are used for all words.

Concept / Approach:
The usual method is to break the base word into individual letters and count how many times each letter occurs. Then, compare each option:

• Check if every letter of the option exists in the base word.
• Ensure that for each letter, the required count does not exceed what is available in the base word.

Any option that fails either check cannot be formed and is your answer.

Step-by-Step Solution:
Step 1: Write out the letters of RESOURCES: R, E, S, O, U, R, C, E, S. Step 2: Count them: R = 2, E = 2, S = 2, O = 1, U = 1, C = 1. Step 3: Check Source. It requires S, O, U, R, C, E. We need S = 1, O = 1, U = 1, R = 1, C = 1, E = 1. All are available within the counts of the base word. So Source can be formed. Step 4: Check Cures. It needs C, U, R, E, S. The base word contains each of these letters at least once, and no letter is overused, so Cures can be formed. Step 5: Check Sour. It needs S, O, U, R. All these letters are present in RESOURCES and are used at most once, so Sour can be formed. Step 6: Check User. It needs U, S, E, R, all of which are present in sufficient counts. Therefore User can be formed. Step 7: Check Rise. It needs R, I, S, E. The base word does not contain the letter I at all. Because I is missing, Rise cannot be formed from RESOURCES.

Verification / Alternative check:
A quick mental strategy is to scan each option for any letter that you do not see in the base word. It is immediately noticeable that I does not appear in RESOURCES, while it appears in Rise. None of the other options contains a clearly missing letter. This confirms Rise as the only impossible word.

Why Other Options Are Wrong:
Source uses letters S, O, U, R, C, and E, all of which are present within available counts. Cures uses C, U, R, E, and S, again all found in the base word. Sour uses S, O, U, and R, which are all present and not overused. User uses U, S, E, and R, each of which exists in RESOURCES in adequate numbers.

Common Pitfalls:
Students may overlook a single missing consonant or vowel, especially when the option seems familiar or simple. Another pitfall is to miscount letters when they repeat in the base word. Training yourself to quickly note absent letters such as I here saves valuable time.

Final Answer:
The only word that cannot be formed from RESOURCES is Rise, because the letter I does not appear in the base word.