Because they were tried, the visitors sat down for a rest

1.Because they were tried, the visitors sat down for a rest.
Because of .......................
2.Everyone in this small town loves Mr.Parker because of kindness.
Because............................
3.Because of its simplicity, this test can be easily done.
Because ...........................
4.Bears can't see well because she have small eyes.
Because...........................
5.They gave up going on picnic because of the heavy rain.
Because it.......................