LIFE SCIENCE

Detailed explanation-1: -In the process of ecological succession, grasses appear before shrubs because grasses-loosen the dirt for new trees to take root. provide food for animals returning to the area. require plenty of sunlight to make their own food.

Detailed explanation-2: -Secondary succession. Secondary succession occurs when the starting point is bare soil that already exists. It is similar to primary succession, however, the pioneer species are often fast-growing plants and often come from pre-existing groups of organisms in the area.

Detailed explanation-3: -Secondary succession is the ecological succession that occurs after the initial succession has been disrupted and some plants and animals still exist. It is usually faster than primary succession as soil is already present, and seeds, roots, and the underground vegetative organs of plants may still survive in the soil.

Detailed explanation-4: -The number and types of animals remain constant. The gradual and predictable change in species composition occurs in a given area. The changes lead to a community that is in near equilibrium with the environment and is called pioneer community.