It’s d. Warmer ocean temperatures but you also wrote that the answer is d in your question lol
Answer:
A pteridophyte is a vascular plant that disperses spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. Ferns, horsetails, and lycophytes are all pteridophytes.
Explanation:
The answer would be A. thick filaments!
The answer is that they are somatic cells
