Final answer:
The color blue is often associated with a sense of freedom and calmness, but can also reflect sadness, demonstrating its multifaceted expressive characteristics. The correct answer are a, b.
Step-by-step explanation:
The expressive characteristics associated with the color blue are primarily freedom and calm. As both the sea and the sky are blue, they can evoke feelings of tranquility, often found peaceful by many people.
However, it's worth noting that while blue can signify freedom and serenity, it can also evoke feelings of sadness, as in the phrase 'feeling blue.' When analyzing the use of color in art and literature, it's essential to recognize how it can embody a range of emotions and meanings based on cultural associations and personal perceptions. Hence the correct options are a, b.