Sure, let's analyze the primary stress positions for each word in the questions:

**Question 1:**
A. ensuring (en-SUR-ing)
B. protecting (pro-TEC-ting)
C. providing (pro-VID-ing)
D. widening (WIDE-ning)

The word "widening" has the primary stress on the first syllable, while the others have it on the second syllable.
**Answer: D. widening**

**Question 2:**
A. donate (do-NATE)
B. apply (ap-PLY)
C. provide (pro-VIDE)
D. study (STUD-y)

The word "study" has the primary stress on the first syllable, while the others have it on the second syllable.
**Answer: D. study**

**Question 3:**
A. successful (suc-CESS-ful)
B. announcement (an-NOUNCE-ment)
C. ignorant (IG-no-rant)
D. experience (ex-PER-i-ence)

The word "ignorant" has the primary stress on the first syllable, while the others have it on the second syllable.
**Answer: C. ignorant**

**Question 4:**
A. environment (en-VI-ron-ment)
B. advertisement (ad-VER-tise-ment)
C. unfortunate (un-FOR-tu-nate)
D. disadvantaged (dis-ad-VAN-taged)

The word "advertisement" has the primary stress on the second syllable, while the others have it on the third syllable.
**Answer: B. advertisement**

**Question 5:**
A. dedicate (DED-i-cate)
B. fortunate (FOR-tu-nate)
C. practical (PRAC-ti-cal)
D. volunteer (vol-un-TEER)

The word "volunteer" has the primary stress on the third syllable, while the others have it on the first syllable.
**Answer: D. volunteer**

**Question 6:**
A. ensuring (en-SUR-ing)
B. protecting (pro-TEC-ting)
C. providing (pro-VID-ing)
D. widening (WIDE-ning)

This is the same as Question 1.
**Answer: D. widening**

**Question 7:**
A. donate (do-NATE)
B. apply (ap-PLY)
C. provide (pro-VIDE)
D. study (STUD-y)

This is the same as Question 2.
**Answer: D. study**

**Question 8:**
A. successful (suc-CESS-ful)
B. announcement (an-NOUNCE-ment)
C. ignorant (IG-no-rant)
D. experience (ex-PER-i-ence)

This is the same as Question 3.
**Answer: C. ignorant**

**Question 9:**
A. ensuring (en-SUR-ing)
B. advertisement (ad-VER-tise-ment)
C. unfortunate (un-FOR-tu-nate)
D. practical (PRAC-ti-cal)

The word "practical" has the primary stress on the first syllable, while the others have it on the second syllable.
**Answer: D. practical**