Q: Does "twinkle" have the same meaning in the following two sentences?

There's a perpetual twinkle in his eyes.

He was a rotund, jolly man with a twinkle in his eye.

OPTIONS:
- different meanings
- the same meaning

A: the same meaning

Q: Does "advance" have the same meaning in the following two sentences?

To advance the ripening of fruit.

To advance one's interests.

OPTIONS:
- different meanings
- the same meaning

A: the same meaning

Q: Does "back" have the same meaning in the following two sentences?

Can you back up your claims?

I can't back this plan.

OPTIONS:
- different meanings
- the same meaning

A:
different meanings