B.
When fossil fuels are burned carbon dioxide is released in to the atmosphere
hope this helps
The endocrine system is made of glands that secrete hormones. These hormones help regulate the organs and cells activity. The hormones among other things control your metabolism.
Earth's crust is made of rock, and rock is made of natural substances called minerals. There are three main types of rock: sedimentary, igneous, and metamorphic rock. Each type is produced in different ways. The oldest rocks on Earth were formed about 3.8 billion years ago.
I've checked all the options and I think that the right answer looks like this: Mollusks have highly developed olfactory receptors.
