I think most of it is just cultural conditioning, we play major key songs when we're happy and minor key songs when we're sad (though this is changing in modern music). Another part of it could be that minor chords have their midtones clash a bit more with there tonic notes than major chords, it sounds slightly "wrong" to our ears and takes away from the happy effect.
Answer:
Agricultural science is a broad multidisciplinary field of biology that encompasses the parts of exact, natural, economic and social sciences that are used in the practice and understanding of agriculture
Answer: the figure wearing black clothes on the bridge is in shock, screaming. in the background is a colorful chaos of colors, ranging from the vibrant red to the deep grayish blue. further behind the figure are two people, appearing to stand still.
hope this helped!