Diagnostic Services.
Therapeutic Services.
Health Informatics.
Support Services.
Biotechnology Research & Development.
Your answer would be $4 times $y.
Hope this helps; have a great day!
C bc the key word is replaced
Trophic levels go by,
Producer (The nuts)
Primary Consumer (Squirrels)
Secondary Consumer (Raccoons)
Tertiary Consumer (Bear)
So squirrels would be at a lower trophic level.
Hope his help :)