Answer:
An avalanche happened when a huge area of snow melted.
Explanation:

The plural for baby is ..... babies
and for woman is ...... women
Answer:
In Gerund form. (+ing).
Explanation:
This occurs since the tenses must be structured like this:
FUTURE PROGRESSIVE:
I will be ______________(VERB in gerund) +ing by tomorrow.
PRESENT PERFECT PROGRESSIVE:
I have been ____________(VERB in gerund) +ing all day.
FUTURE PERFECT PROGRESSIVE:
I will have been___________(VERB in gerund) + ing tomorrow by noon.
Causing to feel pity, because the person comforted the cat due to feeling bad for the cat.