Pls help me 20 points for CORRECT answer

Cactus (3) Producer

1st tropic level (1) Consumer

Eats dead organisms and further breaks them down (2) Decomposer

Dogs and Cats (4) Scavenger

I believe these are all correct after looking them up, if they are wrong please tell me and I can edit it if possible. If you would like explanations for any of them jlmk. Please mark BRAINLIEST if correct! Have a blessed day/night!

the answer would be 3

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]