You should stop resisting / surviving change. There is no way to avoid it.
Resisting
When they were younger, my father used to buy / would buy / bought my mother some flowers every week.It was so sweet.
All are correct
I prefer to read about marine biology to / rather than space exploration.
rather than
They had to monitor the animals that lived in the area.
They had to monitor the animals ...
Living in this area.
I accept / underestimate that you are busy, but I think that you should come to the dinner. It is important.
Accept
Last month, I used to pay / would pay / paid a lot for my phone bill, so this month I’m trying not to use my phone much.
paid
They understand less / fewer about chemistry than about physics.
less
My mom loves to sit on that couch and read her novels.
My mom loves to sit on that couch, ...
reading her novels.
The preparation for the exams was quite stressful, but I managed to adapt / survive it.
Survive
When we lived in Canada, we went skiing every winter. I used to love / would love / loved it.
Used to love
There are more / less rats here than in any other area of the city.
more
As a child who lived in the country, I had a lot of pets.
As a child ..., I had a lot of pets.
living in the country,