Answer:
The answer is support.
Step-by-step explanation:
Support fits clearly with three sentences.
1. The latest evidence doesn't SUPPORT the initial assumptionsWe need to change the way we've thought about the process.
2. I'm really grateful to you for your affection and SUPPORT I received throughout the recovery.
3. Chris had to work hard as he had a wife and three children to SUPPORT.
In the three sentences, support is fits perfectly.