Answer:

1. D. Organism

2. B. Organism

Explanation:

1.the biosphere

The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.

The levels, from smallest to largest, are: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

2.The 4th level of organization, organ systems are made up of two or more organs and the system provides a basic function for the organism. Dolphins have a outer layer of skin called the epidermis and it is 10 to 20 times thicker then humans.