Прочитайте текст с пропусками, обозначенными номерами 3036. Эти номера соответствуют заданиям 3036, в которых представлены возможные варианты ответов. Запишите в поле ответа цифру 1, 2, 3 или 4, соответствующую выбранному Вами варианту ответа. 31. 1) Firstly 2) To begin with 3) At first 4)Starting with November, the month when the trees dropped their last leaves, exposing their gloomy branches to the power of winds and cold snaps. 30_______, quite recently the trees were full of multi-colored leaves: yellow, orange, red... Now the leaves scattered by the wind and dried by morning frosts have acquired a brown color. During the year, nature changes its color, passing through the stages of life and growth, then calm and decay. In spring, new leaves appear from the buds, in summer the leaves play an important role for the forest and flora, and in autumn they turn yellow and fall off. How and why do leaves go through an interesting color evolution from green to yellow to brown? 31_______, let's figure out why the leaves appear green in spring and retain this color throughout the summer. Leaves acquire their juicy green color due to the pigment chlorophyll. The pigment intercepts the rays of the sun and with the help of solar energy through water and carbon dioxide makes simple sugars that become food for plants. 32_______, in summer the leaves are green. In autumn, the exchange of juices between the leaves and branches of trees, which they hold on to, decreases and the chlorophyll content drops. 33_______, other pigments that have always been in smaller quantities in the leaf appear these are carotenoids. 34_______, it is carotenoids that make carrots red. 35_______, autumn leaves turn yellow and red, 36_______ the brown color of dry leaves is due to the fact that all the coloring pigments have collapsed and the cell walls of the leaf have become visible.