Colour

The governing concept is visual balance, which depends on colour weight as well as physical area. A small, highly saturated or dark colour may attract as much attention as a much larger quiet, low-intensity area. Combining these unequal areas can distribute attention across the composition and create equilibrium. Option A is correct. Random placement gives no reliable balance, hiding the subject harms hierarchy, and equal value is not necessary.

The governing concept is colour symbolism in visual communication. Green commonly suggests nature, growth, freshness, or environmental care, while brown can suggest soil, wood, stability, and an earthy quality. Used together in a product poster, they can support a natural and dependable brand message. Option A is therefore correct. Red or warning colours would more readily suggest danger, random noise is not a message, and colour choices do carry meaning.

The governing concept is harmony between colour symbolism and communication purpose. A health poster often needs clarity, cleanliness, freshness, and trust. Very dark, dull, or muddy colours can make the design feel heavy, dirty, or unclear, so they may weaken those associations unless used deliberately as a small contrast. Option A is correct. The other options use absolute claims or wrongly deny the communicative role of colour.

The governing concept is colour relativity: colour perception is influenced by context rather than being fixed in isolation. The same patch may appear warmer, cooler, lighter, darker, brighter, or duller when its surrounding hue or value changes. Therefore option A gives the correct meaning. B and C contradict the contextual nature of perception, while D confuses a visual relationship with sound. The effect is perceptual, even though the physical colour sample remains unchanged.

The governing concept is colour relativity and simultaneous contrast. A grey sample has a measurable value, but the eye judges it in relation to the surrounding field. Against a dark background it may appear lighter; against a light background it may appear darker. A coloured background can also produce a hue bias. Option A is correct, while B, C, and D deny measurable value, contextual influence, or visibility without justification.

The governing concept is colour proportion, meaning the relative amount of space assigned to each colour. A dominant colour establishes the overall mood, a smaller accent can create emphasis, and the distribution of light, dark, warm, or cool areas affects balance and hierarchy. Option A is correct. Equal areas are not a universal rule, colour proportion clearly matters, and proportion applies beyond line alone.

The governing concepts are visual weight, value contrast, and focal emphasis. A very large dark area carries substantial visual weight and can make the composition feel serious, dense, or heavy. A small light area against it becomes highly noticeable because of the strong value difference, creating a focal contrast. Option A is correct. The arrangement is not automatically airy or neutral, and it clearly produces a visual effect.