I would have to say probably d.
Answer: C. placentals.
Explanation:
The placentals are the mammals which give birth to a fully developed live young individual. These animals are characterized by the presence of placenta which creates a boundary around the fetus. The transfer of food takes place through the tissues of the placenta. Also the wastes are excreted out through placenta.The placental mammals keep their fetus inside the placenta for a complete period of gestation until the complete physical form of the fetus get developed.
<span>The symptoms of xeroderma pigmentosum, or XP, usually appear in infancy. They can range from extreme sunburn after a few minutes of exposure to UV rays, to the reddening of the white of the eyes if no sun protection is worn. Most patients with XP develop skin or eye cancer multiple times in their lifetime. Around half of the children diagnosed with XP will develop skin cancer by their 10th birthday.</span>
<span>Many diseases in the 1900s, especially the early 1900s spread and developed much quicker. These diseases were also much more fatal. Today, vaccines and medications have helped prevent the spread of disease as well as treat them.</span>
Living things like people or trees need food and air to survive unlike non-living things.
Non-living things like rocks and tent are more of resources for us living things to use.
For example:
Living Non-living
animals need air to breath
plants need sunlight to make sugar
humans need water to have energy