Answer:
The correct answer will be option-
1. tissue
2. organ system
Step-by-step explanation:
The organization of living things shows that life evolved from simplicity to complexity.
A living organism is made up of a cell which is considered the smallest unit of life. The cell gets accumulated and organised to form tissues which perform similar tasks. This tissue further organizes to form organs which specialized to perform coordinated functions. This specialization is known as an organ system and this organ system makes an organism.
Thus, tissue and the organ system is the correct answer.