I think the most likely subject of the passage is a.
Difficulties faced in the home are many. Sometimes it is easy and the other time it is tough.
Explanation:
No.1. Homely environment makes life a bit miserable, at the same time allows skipping some and focusing on priority.
No. 2. Necessary things can be done at ease, while the difficult ones take some time and squeeze your patience to a great extent.
No. 3. Adams have shown this flexibility as per general characteristic.
