The embryo, endosperm and seed coat.
Answer: B
Explanation: So air, like most other substances, expands when heated and contracts when cooled. Radiation cooling occurs when air near the ground is cooled by the Earth's surface losing heat by radiation.
Optical microscope.
Hope this helps.
the answer is decomposition.
Because tropical levels used to be broken because temperatures hasn't varied in the years and history of global temperatures and history.