The hygienic nature is essential personally in our lives. Therefore, it is not good to skimp our personal hygenie and cleanliness in our lives.
This hygienic nature contributes for good health. The other words such as insurance, friendliness are not going to depict anything about hygenie.
Thus, the options (c), (d) and (b) are incorrect.
The hygienic nature is essential personally in our lives. Therefore, it is not good to skimp our personal hygenie and cleanliness in our lives.
Therefore, the correct option is – a. measures contributing to cleanliness and good health.