how lysosomes may be involved in the removal of the interdigital membrane of the developing mammalian fetus.

Lysosomes are organelles that contain hydrolytic enzymes  (lysozymes) which are required for membrane degradation, thereby they may be important during the removal of the interdigital membrane.

Explanation:

Lysosome plays a critical function by digesting cellular components such as, in this case, the interdigital membrane. During mammal embryo development, the interdigital membrane is reabsorbed, it is a structure between the digits that appeared during evolution in aquatic animals. However, in terrestrial mammals, it is a vestigial structure leftover from their ancestors.

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies

i think the answer is b.