christmas trees have cones and needles which makes them

Christmas trees have cones and needles, which makes them conifers —a group of mostly evergreen trees specially adapted to cold, dry conditions and winter survival.

What that sentence is getting at

When someone says “Christmas trees have cones and needles which makes them…”, the natural completion is:

“…which makes them coniferous trees (conifers).”

So, a good, clear finish to the line is:

• “Christmas trees have cones and needles, which makes them conifers.”
• Or: “...which makes them coniferous evergreen trees.”

Why cones and needles matter

• Cones hold the tree’s seeds, which is the defining feature of conifers. The word “conifer” literally means “cone bearer.”

• Needles are narrow, wax-coated leaves that help the tree conserve water and resist freezing, letting many Christmas-tree species stay green all winter.

How this fits Christmas trees

Most real Christmas trees are species of fir, pine, or spruce, all of which are conifers with cones and needles.

So for your title phrase “christmas trees have cones and needles which makes them,” the accurate, SEO-friendly completion is something like:

“Christmas trees have cones and needles, which makes them coniferous evergreens perfectly adapted to stay green through winter.”

Meta description idea:
“Christmas trees have cones and needles, which makes them coniferous evergreens adapted to survive cold winters, retain their color, and carry seeds in cones—perfect symbols of life during the holidays.”

Information gathered from public forums or data available on the internet and portrayed here.