So they can keep track of their work
Answer:
A. one's dharma. good or bad actions determine the future modes of an individual's existence.
Explanation:
Ingredients dry out over time and/if exposed to oxygen
Answer:
I generally recommend checking your car's oil at least once a month, if not more frequently. Your oil probably only needs to be changed between two and four times per year, which means that if you only rely on oil changes, you could have an unchecked issue for months before it's fixed.