Here are the answers to the questions based on the underlined parts of the words that differ in pronunciation or stress:

**1.** The question is about the vowel sound in the words:
- **A.** mess**age** (pronounced with a schwa sound /ə/)
- **B.** lugg**age** (pronounced with a schwa sound /ə/)
- **C.** cott**age** (pronounced with a schwa sound /ə/)
- **D.** hospit**able** (the second 'a' has a different vowel sound /æ/)

**Answer:** **D**

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**3.** The question compares the vowel sounds:
- **A.** man**age** (the 'a' has a schwa sound /ə/)
- **B.** buff**a**lo (the first 'a' is /æ/)
- **C.** acc**ount** (the 'a' is /æ/)
- **D.** m**a**ture (the 'a' can either be /ə/ or /eɪ/ depending on accent)

**Answer:** **B**

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**4.** The question compares the ending sounds of the words:
- **A.** addict**ed** (the 'ed' is pronounced as /ɪd/)
- **B.** announc**ed** (the 'ed' is pronounced as /d/)
- **C.** visit**ed** (the 'ed' is pronounced as /ɪd/)
- **D.** need**ed** (the 'ed' is pronounced as /ɪd/)

**Answer:** **B**

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**5.** The question compares the final 's' sounds:
- **A.** orchard**s** (the 's' is pronounced as /s/)
- **B.** forum**s** (the 's' is pronounced as /z/)
- **C.** villager**s** (the 's' is pronounced as /z/)
- **D.** account**s** (the 's' is pronounced as /s/)

**Answer:** **B**

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**6.** The question looks at the sounds of the vowels:
- **A.** concl**u**sion (the 'u' is /ʊ/)
- **B.** w**oo**d (the 'oo' is /ʊ/)
- **C.** neighbourh**oo**d (the 'oo' is /ʊ/)
- **D.** f**oo**tball (the 'oo' is /ʊ/)

**Answer:** None of them differ significantly. So better to say **None or E**.

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For the stress questions:

**1.** Comparing the stress placement:
- **A.** ac**count**
- **B.** ma**ture**
- **C.** **for**um
- **D.** up**load**

**Answer:** **C**

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**2.** Comparing the stress placement:
- **A.** **be**nefit
- **B.** con**ven**ient
- **C.** cul**ti**vate
- **D.** **teen**ager

**Answer:** **A**

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Feel free to clarify any particular question or for further assistance!