Which of these structures transports sugars from the leaves to the roots? a-xylem b-tracheids c- trichomes d-phloem

Option D, Phloem

Explanation:

Phloem and Xylem are parts of vascular system of a plant. While phloem transports food produced in the leaves,   Xylem transports water absorbed by roots to all other parts of the plant. Phloem tissue is composed of cambium cells and sieve tubes which run all along through the plant body thereby allowing transmission of food  to all non photosynthesizing parts of the plant such as stem, roots, etc . The transportation through phloem tissue is bi-directional unlike the transportation through xylem.

the core of the sun is so hot and there is so much pressure, nuclear fusion takes place, hydrogen is changed to helium. nuclear fusion creates heat and photons. when the heat reaches the earth it warms the molecules of the atmosphere, and they warm other molecules and so on.

the cell cycle is the final answer! : )