the core? maybe i don't quite understand the question
Answer:
B) The surface layer of permafrost thaws in summer.
Explanation:
Permafrost is frozen ground or frozen soil. It is a landform in which the ground remains frozen for over a long period of time usually more than two years. Permafrosts are usually found in high latitude regions. For a permafrost to form, the temperature must remain considerably below freezing point.
The surface layer of a permafrost is bounded by the permafrost table and below it lies the active layer. During summer when temperature rises above freezing point, this layer thaws. In winter times, the surface layer remains frozen.
D. The part of Africa is south of the Sahra.
Answer: The fungi spores attach to the roots of the host and form networks of microscopic fibers called hyphae that form large networks that reach where roots cannot. The hyphae help the plant absorb water, mineral salts and nutrients for strong growth.
Answer:
Physical characteristics include land forms, climate, soil, and natural vegetation. For example, the peaks and valleys of the Rocky Mountains form a physical region. Some regions are distinguished by human characteristics. These may include economic, social, political, and cultural characteristics.