The correct answer is A. Sciophytes.
Sciophytes are plants that grow in shade. They have adapted to low-light conditions by having leaves that are larger and thinner than those of sun-loving plants. Sciophytes also have a higher concentration of chlorophyll in their leaves, which allows them to absorb more light.
Heliophytes are plants that grow in full sun. They have adapted to high-light conditions by having leaves that are smaller and thicker than those of shade-loving plants. Heliophytes also have a lower concentration of chlorophyll in their leaves, which allows them to avoid damage from too much light.
Oxylophytes are plants that grow in acidic soils. They have adapted to these conditions by having a higher concentration of acids in their tissues. Oxylophytes also have a higher concentration of minerals in their tissues, which helps them to absorb nutrients from the soil.
Epiphytes are plants that grow on other plants, but they do not take nutrients from their host plants. Epiphytes have adapted to these conditions by having roots that are covered in a layer of cells that absorb water and nutrients from the air.
I hope this helps!