Select a biome that you will use in #7 and write that biome on the line. Then, list potential biotic and/or abiotic factors in #3-6. Describe the levels of #7 and 8.

i think its the first one

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

i won't lie i don't know so go online and ask google thats what i do