What movement causes a year and how long is it

Revolution of the earth around the sun in its own orbit. A complete revolution of the earth is a year equal to 365 days

Explanation:

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

6.4 cm (max) - 25 cm (min)