DENDROLOGY

Detailed explanation-1: -Thus, the correct answer is ‘Plants, algae and some bacteria.

Detailed explanation-2: -Helianthus annuus is an autotroph meaning that it makes its own food via photosynthesis. The leaves of a sunflower are phototropic, they turn to follow the rays of the sun. This increases the amount of light intercepted and leads to increased photosynthesis.

Detailed explanation-3: -Plants, algae, and a group of bacteria called cyanobacteria are the only organisms capable of performing photosynthesis.

Detailed explanation-4: -The plant absorbs sunlight in its green chlorophyll, carbon dioxide through the leaves, and water through the roots to produce oxygen and sugars during photosynthesis. The sugars are converted to carbohydrates and used for growth and development.